Jackson Del Rosario @JacksonDels2 Twitter profile

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Jackson Del Rosario

@JacksonDels2

1 year

Happy to announce that I have accepted a Summer Internship with the Arizona Diamondbacks as an R&D Intern

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Jackson Del Rosario

@JacksonDels2

2 years

If you want to talk about a massive change, check out Kumar Rocker's 2021 Vanderbilt vs his 2022 AFL Movement

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Jackson Del Rosario

@JacksonDels2

2 years

Highest Avg EV in the AFL 2022: (Min 50 PA) 1. Jordan Walker (STL) 2. Heston Kjerstad (BAL) 3. Carlos De La Cruz (PHI) 4. Stephen Scott (BOS) 5. Wilyer Abreu (BOS)

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Jackson Del Rosario

@JacksonDels2

3 years

How to Predict Launch Angle, and What it Can Tell Us (xLA)

How to Predict Launch Angle, and What it Can Tell Us

It’s still winter break, and as I’ve been preparing for the spring slate of games at Arizona, I often get ideas for projects that sound…

link.medium.com

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Jackson Del Rosario

@JacksonDels2

11 months

Crazy

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Jackson Del Rosario

@JacksonDels2

11 months

Crazy pt 2

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Jackson Del Rosario

@JacksonDels2

2 years

First of many 🙌

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Jackson Del Rosario

@JacksonDels2

3 years

My article (and code) for xOff+

What can we predict with MiLB Numbers?

If you’ve ever looked into Minor League Baseball numbers you’ll notice it's a bit incomplete. It has all the fun surface-level stats we…

link.medium.com

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Jackson Del Rosario

@JacksonDels2

3 years

One of many

Teddy Cahill

@tedcahill

3 years

What's the college baseball memory you're taking with you from 2021?

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Jackson Del Rosario

@JacksonDels2

2 years

Jack Leiter's Movement Profile Evolution from College to Pros. Although losing VB on the FB, the rest of the arsenal is much more refined. Note: Has thrown five cutters this season

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Jackson Del Rosario

@JacksonDels2

3 years

I'm a wizard @ArizonaBaseball

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Jackson Del Rosario

@JacksonDels2

3 years

Ok Joely is a beast, so not happy about that.

Jeff Passan

@JeffPassan

3 years

The New York Yankees’ deal to acquire outfielder Joey Gallo from Texas had undergone slight adjustments, sources tell ESPN, but is expected to be finalized Thursday. As @JackCurryYES said, this version will send four prospects to Texas, not six, and Joely Rodriguez to New York.

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Jackson Del Rosario

@JacksonDels2

2 years

2022 Board Update: New Top 100

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Jackson Del Rosario

@JacksonDels2

3 years

#Gary

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Jackson Del Rosario

@JacksonDels2

2 years

. @tannero42

Teddy Cahill

@tedcahill

2 years

What's the college baseball memory you're taking with you from 2022?

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Jackson Del Rosario

@JacksonDels2

1 year

WHY NOT

Arizona Baseball

@ArizonaBaseball

1 year

🗣️ 𝐓𝐡𝐞𝐲 𝐂𝐡𝐨𝐬𝐞 𝐭𝐡𝐞 𝐂𝐚𝐭𝐬‼️ For the 42nd time in program history the Arizona Wildcats are NCAA Tournament bound! #BearDown

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Jackson Del Rosario

@JacksonDels2

3 years

Starting some fun stuff, still very confused

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Jackson Del Rosario

@JacksonDels2

2 years

Nick Yorke ( @nickyorke2 ) with a promising AFL compared to his 2022 Regular Season: Compared to his A+ Stint: +0.282 OPS +4.2 BB% +4.2 EV +4.2 Contact% +2.3 MaxEV (>110) -7.8 K% -5.7 Chase%

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Jackson Del Rosario

@JacksonDels2

2 years

List of AFL Players with: Chase Rate < 20% 90th %tile EV > 105 MPH Contact Rate > 80% (Min 50 PA) Matt Mervis (CHC) Zach Britton (TOR)

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Jackson Del Rosario

@JacksonDels2

2 years

We back

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Jackson Del Rosario

@JacksonDels2

3 years

@justinochoi This is oddly poetic considering its the Mariners

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Jackson Del Rosario

@JacksonDels2

3 years

The goal of most sinkers is to produce GBs (and thus low LAs), and while it definitely helps to live low in the zone, you can get away with leaving it up, as long as you have plus sink.

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Jackson Del Rosario

@JacksonDels2

2 years

@tejfbanalytics why was she playing 7/2 off on the button hahaha

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Jackson Del Rosario

@JacksonDels2

3 years

@NightengaleStan @Jolly_Olive Translation: If you ignore what happened on the field, Cole is Better.

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Jackson Del Rosario

@JacksonDels2

2 years

Great Collection so far

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Jackson Del Rosario

@JacksonDels2

3 years

Coach

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Jackson Del Rosario

@JacksonDels2

3 years

@Pitching_Bot Pitch Tipping

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Jackson Del Rosario

@JacksonDels2

2 years

Here's a Quick 🧵on all the Position Player Groups Draft Eligible College Contact Rate x 90%tile EV, starting with Catchers:

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Jackson Del Rosario

@JacksonDels2

3 years

My Two 80-Grade Stuff CBs: Jesus Luzardo Jonathan Loaisiga

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Jackson Del Rosario

@JacksonDels2

2 years

My 2022 MLB Draft Board (thus far), updates often!

Public 2022 Board

docs.google.com

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Jackson Del Rosario

@JacksonDels2

2 years

Hopefully this helps explain the Eric Brown, Zach Neto love. Also s/o Alan Roden

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Jackson Del Rosario

@JacksonDels2

2 years

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Jackson Del Rosario

@JacksonDels2

3 years

In terms of what Predicts Launch Angle from a Pitcher's Perspective, it's really only plate height and vertical break. (Side is 1 if P/B are same Hand, 0 if not)

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Jackson Del Rosario

@JacksonDels2

2 years

Final Update 2022 Draft Board 🧵 - T300 1-100

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Jackson Del Rosario

@JacksonDels2

2 years

King of New Zealand @WWBAD32

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Jackson Del Rosario

@JacksonDels2

2 years

If you wanna see my 2022 MLB Mock Draft V1

2022 MLB Mock Draft V1

As my season at Arizona concludes, I thought it would be a good idea to work on some draft projects and as I polish and add to my big…

link.medium.com

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Jackson Del Rosario

@JacksonDels2

1 year

479

Arizona Baseball Analytics

@AZStatCats

1 year

. @tonybullard13 With. A. Nuke. EV: 112 MPH LA: 25° Distance: 479’ Hang Time: 5.8 Sec

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Jackson Del Rosario

@JacksonDels2

3 years

Muchhhhh Easier s/o @BillPetti

Jackson Del Rosario

@JacksonDels2

3 years

Can't beat a good ol' scrape-a-thon

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Jackson Del Rosario

@JacksonDels2

2 years

We back

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Jackson Del Rosario

@JacksonDels2

3 years

It’s still ridiculous to me that there are tests in a “computer science class” that you cannot use a computer, let alone a final

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Jackson Del Rosario

@JacksonDels2

2 years

Specs on this Super Sweeper: 81.2 MPH 2787 RPM 8:45 Tilt -2.3 iVB -28.6 HB 5.2 Ft RelH

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Jackson Del Rosario

@JacksonDels2

3 years

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Jackson Del Rosario

@JacksonDels2

2 years

Including one of my new favorite draft pitchers Mike Walsh out of Yale: One of the nastiest sweepers in the draft, here's one at 82 MPH for a K.

Jackson Del Rosario

@JacksonDels2

2 years

Red Sox 10 Round Mock V2 with 10 new guys!

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Jackson Del Rosario

@JacksonDels2

2 years

Wild 🔥 🔥

Arizona Baseball

@ArizonaBaseball

2 years

The rosters are 🔒𝐥𝐨𝐜𝐤𝐞𝐝🔒 for the 2022 Wild vs. Cats World Series. #BearDown Who ya got?? 🤔

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Jackson Del Rosario

@JacksonDels2

3 years

Good to be back #MexicanBaseballFiesta

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Jackson Del Rosario

@JacksonDels2

3 years

I am now in full support of robotic umpires, sorry catchers.

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Jackson Del Rosario

@JacksonDels2

11 months

Mexican Baseball Fiesta 🇲🇽

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Jackson Del Rosario

@JacksonDels2

2 years

@Jared_Carrabis @LouMerloni They likely expect both a viewer and ticket sales boost to compensate and more for this.

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Jackson Del Rosario

@JacksonDels2

3 years

lol

MLB Pipeline

@MLBPipeline

3 years

The 2022 Top 100 Draft Prospects list is out! Have at it:

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Jackson Del Rosario

@JacksonDels2

2 years

Call Griff McGarry up for the World Series @Phillies

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Jackson Del Rosario

@JacksonDels2

3 years

First iteration of all pitches at once, here's top 10 seasons since 2019 per xrv/100 + importance matrix

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Jackson Del Rosario

@JacksonDels2

2 years

@JoeDoyleMiLB you’re missing TJ Nichols

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Jackson Del Rosario

@JacksonDels2

3 years

Ford Vs Ferrari

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Jackson Del Rosario

@JacksonDels2

3 years

College is really hard guys

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Jackson Del Rosario

@JacksonDels2

2 years

He also completely changed his stance, with arms much higher, the stance is wider and more open, and its paid dividends. New Photo From Sep 10, so this was a very recent adjustment

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Jackson Del Rosario

@JacksonDels2

3 years

As a rule of thumb -- you can't accurately predict any stat just using their previous season.

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Jackson Del Rosario

@JacksonDels2

2 years

xOff+ loved Steven Kwan

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Jackson Del Rosario

@JacksonDels2

2 years

One Week

Arizona Baseball

@ArizonaBaseball

2 years

Be 𝐜𝐨𝐧𝐬𝐢𝐬𝐭𝐞𝐧𝐭 in your work. 😤 7️⃣ Days #BearDown

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Jackson Del Rosario

@JacksonDels2

3 years

Where’s my pro deal? KC

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Jackson Del Rosario

@JacksonDels2

3 years

Laz Diaz should never umpire another playoff game again.

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Jackson Del Rosario

@JacksonDels2

2 years

Finished Reports for the Tentative T100 #MLBDraft

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Jackson Del Rosario

@JacksonDels2

2 years

Thought I would Update xOff+, and see where guys dealt at the deadline rank

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Jackson Del Rosario

@JacksonDels2

3 years

Win the Pac ✅ Win the Regional ✅ Next Step: Supers.

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Jackson Del Rosario

@JacksonDels2

3 years

In Eduardo Rodriguez's last 21.1 innings: 2.11 ERA 1.86 FIP 26 Ks 0 HRs

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Jackson Del Rosario

@JacksonDels2

3 years

@CollegeBallNat

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Jackson Del Rosario

@JacksonDels2

3 years

We can see a clear relationship between more VB and a higher Plate Height and Launch Angle. Dotted Lines are Strike Zone Top and Bottom Solid Line is Average VB for that pitch grouping

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Jackson Del Rosario

@JacksonDels2

3 years

Late Night @LunaJr_ Hype, More Strikeouts, Less Runs = BEAST

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Jackson Del Rosario

@JacksonDels2

3 years

ELO Top 25: 1. Tennessee 2. Arkansas 3. Vandy 4. Ole Miss 5. UT 6. Miss St 7. TTU 8. TCU 9. ECU 10. Ok St 11. Arizona 12. Notre Dame 13. UF 14. S. Carolina 15. Miami 16. LA Tech 17. NC St 18. Louisville 19. LSU 20. UGA 21. Old Dom. 22. FSU 23. ASU 24. Southern Miss 25. Oregon

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Jackson Del Rosario

@JacksonDels2

2 years

The BEST in the business!

Arizona Baseball

@ArizonaBaseball

2 years

Always keeps us looking 💯 Happy #EQAppreciationWeek to Big Wen, the BEST in the business! 🫡

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Jackson Del Rosario

@JacksonDels2

1 year

U.S.A.

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Jackson Del Rosario

@JacksonDels2

2 years

LETS GOOOO

J.P.

@Jaypers413

2 years

Daniel Susac HR (1) - first career @stocktonports @Athletics

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Jackson Del Rosario

@JacksonDels2

3 years

3-0 🧹

Arizona Baseball

@ArizonaBaseball

3 years

#WinnerWinner ‼️ Wildcats crush #14 Texas Tech to sweep the College Baseball Showdown! 🧹🧹🧹

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Jackson Del Rosario

@JacksonDels2

3 years

109°

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Jackson Del Rosario

@JacksonDels2

3 years

2-0

Arizona Baseball

@ArizonaBaseball

3 years

#WinnerWinner ‼️ Cats boom the Sooners, 14-4!

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Jackson Del Rosario

@JacksonDels2

3 years

How the hell does the cheerio bee put his shirt on?

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Jackson Del Rosario

@JacksonDels2

3 years

@NickAdamsUSAFan copying @RyanGarciaESM

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Jackson Del Rosario

@JacksonDels2

3 years

Well the answer to the question “what would Matthew Stafford do on a good team?” was answered tonight

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Jackson Del Rosario

@JacksonDels2

3 years

A 15 Point Game has a much higher chance of a tie than a 12 point game...

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Jackson Del Rosario

@JacksonDels2

3 years

Oh yeah, this is nice

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Jackson Del Rosario

@JacksonDels2

3 years

@Duvall2NYY Here's a Trade Proposal for You NYY Gets: OF Joey Gallo $550K Cash TEX Gets: RHP Luis Medina OF Eversen Pereira C Anthony Siegler SS Roberto Chirinos

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Jackson Del Rosario

@JacksonDels2

3 years

Of all pitches in the strike zone since 2019, this pitch had the lowest xLA at -24°, with a real LA of -51°

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Jackson Del Rosario

@JacksonDels2

3 years

Love when I fix one major R problem and then it messes something else up!

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Jackson Del Rosario

@JacksonDels2

3 years

alright here’s my best attempt, angle sucks but I got the beanie right

Marcus Stroman

@STR0

3 years

Overhead shoulder and core stability.

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Jackson Del Rosario

@JacksonDels2

3 years

Go Follow

Arizona Baseball Analytics

@AZStatCats

3 years

The official page of @ArizonaBaseball Data and Analytics. Posting the numbers behind the best college baseball program in the country. #StatCats #Omaha

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Jackson Del Rosario

@JacksonDels2

3 years

At Vandy NC State Game - kid goes up to a scout and asks “Did you scout Fernando Tatis?”

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Jackson Del Rosario

@JacksonDels2

2 years

@Data_prospects Also committed to the best school in the country

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Jackson Del Rosario

@JacksonDels2

1 year

WHY NOT

Arizona Baseball

@ArizonaBaseball

1 year

#WinnerWinner ‼️ The Wildcats run rule the regular season champions 14-4 and advance to the Pac-12 Tournament Championship Game! 🫡 #BearDown

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Jackson Del Rosario

@JacksonDels2

3 years

Just wanted to point out I predicted Semien to the Rangers on @deepdrivepod

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Jackson Del Rosario

@JacksonDels2

3 years

One of those days

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Jackson Del Rosario

@JacksonDels2

3 years

I already know I'm gonna be obsessed with reactable

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Jackson Del Rosario

@JacksonDels2

3 years

R2 is the batting average of stats, useful at a surface level, but in most scenarios you’ll use something else.

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Jackson Del Rosario

@JacksonDels2

2 years

Seems like Boston really hit on three of their 2021 Draft Picks from an offensive standpoint.

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Jackson Del Rosario

@JacksonDels2

1 year

Only 0.08%?? @WWBAD32

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Jackson Del Rosario

@JacksonDels2

3 years

2021 Top (Min 150 PA) 1. Nick Pratto AAA 2. Steven Kwan AA 3. MJ Melendez AAA/AA 4. Wander Franco AAA 5. Alek Thomas AAA 6. Julio Rodriguez AA 7. Luis Garcia AAA 8. Justin Foscue A+ 9. Hoy Park AAA 10. Riley Greene AAA

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Jackson Del Rosario

@JacksonDels2

3 years

Still making some minor tweaks to the model, then I'll publish all of it, but here's the tentative t25