MACK - IN FOCUS - Jett Williams, Osiris Calvo, Jonathan Santucci, Carlos Mendoza on Sproat, Stealing Tickets, Clayton Kershaw

 

37) Jett Williams

The Good

Elite speed and a patient approach lets Williams wreak havoc on the base paths. His smaller frame packs a decent punch thanks to above average bat speed and air pull tendencies. He should be a solid defender up the middle.

 

The Bad

Sometimes gets caught snoozing with his patience, especially against heat

Mets Prospect Group       @bkfan09         DSL TOP 10

7.            SP           Osiris Calvo

Osiris Calvo is a 21-year-old left-handed pitcher in the New York Mets' minor league system, who played in 2025 for the DSL Mets Orange in the Dominican Summer League.

Born in Santo Domingo, Dominican Republic, he was signed as an international free agent on January 15, 2023.

After missing the entire 2024 season due to injury, Calvo had a strong 2025 season, earning the Mets' DR Academy Pitcher of the Year award.

He went 5-1 with a 2.51 ERA over 11 appearances (9 starts), pitching 43 innings with 45 strikeouts, a 0.98 WHIP, and holding opponents to a .211 batting average.

Notable performances include a DSL Pitcher of the Week honor in July 2025 after striking out eight over five hitless innings and being selected as a midseason All-Star.

At 6'4", his physical frame suggests potential for further development.

His high strikeout rate (9.4 K/9) and low walk rate (2.1 BB/9) indicate a pitcher with good control and likely a mix of pitches that generate swings and misses.

Prospects Who Will Break Into the Top 100 in 2026

https://www.justbaseball.com/prospects/five-prospects-break-into-top-100-2026/?s=03

Jonathan Santucci, LHP, New York Mets

At a Glance

2025 MiLB: 25 G (23 GS), 117.2 IP, 10.56 K/9, 3.14 BB/9, 0.69 HR/9, 47.2% GB%, 3.06 ERA, 3.12 FIP, 2.98 xFIP

Case for Helium

A 2024 second-round pick, Santucci has made a strong impression in his first full season of pro ball. His delivery features a deliberate arm stab in back, adding deception that especially plays against lefties.

The arsenal is led by a mid-90s four-seam fastball with solid ride and a biting slider he confidently deploys to both right- and left-handed hitters. That two-pitch mix powered a 20.2% K-BB rate in 2025. His ability to land the slider against right-handers is a separator and one of the reasons evaluators believe he can stick in a rotation despite lacking a polished third pitch.

Beyond the whiffs, Santucci also kept the ball on the ground, with a 47.2% GB rate across both levels, including a 51.3% rate at Double-A.

Overall Outlook

The open question is whether Santucci can develop a consistent third offering. His walk rate (8.5% across two levels) hints at occasional command lapses, but the quality of his fastball/slider combo helps cover for it. While two-pitch lefties have succeeded as starters before (think Carlos Rodón), adding even an average third pitch would push Santucci’s ceiling much higher.

As is, he already projects as a mid-rotation starter and could be the next arm to join the Mets’ wave of young pitching. After his 2025, he belongs firmly in top 100 discussions.

 

Mets' Carlos Mendoza explains why he pulled Brandon Sproat after four innings vs. Nationals

https://sny.tv/articles/mets-carlos-mendoza-why-brandon-sproat-four-innings-nationals?s=03

"The first two innings, he was pretty nasty, especially the way he was using the breaking ball," he explained. "The sweeper, the curveball, he used a lot of them for strikes to get chases, swing and misses, get back in counts, The sinker was playing up. The third inning, he lost it a little bit. It got away from him a little bit because he lost the strike zone there for a minute. One batter from getting out of that inning, then they hit some balls really hard there.

I like what I saw. Even though he only gave us four, I was aggressive with him. I thought he could have kept going, but where we’re at every game, I’m going to be aggressive when we need to. It was a positive outing for him.

Watching those lefties in that third inning. After [James] Wood, [CJ] Abrams, all the lefties, there was some hard contact from them. Wasn’t going to take chances there, especially after we got back. Wanted to give [Huascar Brazoban] or whoever a clean inning. That was the reason there." 

 

‘Bad actors’ are stealing, reselling fan tickets swiped from MLB’s Ballpark app, MLB acknowledges

https://www.nytimes.com/athletic/6644767/2025/09/19/mlb-digital-ticket-theft-ballpark-app/

On Reddit, one user posted a screenshot of a message that appeared to come from the New York Mets acknowledging “unrecognized transactions.” The Mets did not respond to The Athletic’s request for comment.

Fans with tickets to watch home games for large-market teams such as the Mets and Red Sox appear to be more popular targets for the scammers, the league official briefed on the incidents said. Those tickets tend to sell for high prices.

“We’re not able to comment on the situation as investigations are still ongoing,” SeatGeek said.

MLB is focusing on its users’ password hygiene.

“We are telling fans to reset their password to a new, unique password that they will not use anywhere else,” MLB said in its statement. “We have taken this step as a precaution in an effort to protect fans and their tickets. Before leaving for the game, fans should check their Ballpark account and/or proactively reset their password. They should log out of all MLB applications and log back in with their updated password.”

In his prime, Clayton Kershaw mastered the ‘high-quality start.’ As he leaves the stage, it’s a lost art

https://www.nytimes.com/athletic/6640876/2025/09/19/clayton-kershaw-dodgers-sliders-joe-ryan/

Clayton Kershaw is retiring at a fragile point for the craft of starting pitching. It’s still an extremely important (and well-paid) job. But diminished workloads offer fewer chances to witness true greatness.

From 2011 through 2017, Kershaw delivered it with consistency that seems unfathomable now. Of Kershaw’s 207 starts across those seven prime seasons, 123 lasted at least seven innings with no more than two earned runs allowed. That’s almost 60 percent.

Through Wednesday, the day before Kershaw announced his plans to retire from the Los Angeles Dodgers after this season, only 10.2 percent of all MLB starts had met those standards in 2025. Prime Kershaw, roughly, did it six times as often.

Even in this age of bullpenning, the high-quality start — minimum seven innings, maximum two earned runs — is simply the best way to win a baseball game.

This is a concept we’ve been trying to popularize for a while. It’s not a criticism of the quality start, defined as six innings with no more than three earned runs allowed. When starters do that, according to the Elias Sports Bureau, their teams have a .688 winning percentage — a 112-win pace in a 162-game season.

But let’s add one inning to that quality-start minimum while subtracting one earned run. The seven-inning/two earned-run start — that’s high quality. And when starters do that, their teams have an .812 winning percentage, good for 132 wins in a 162-game season.

Through Wednesday, 34.8 percent of all starts this season had met the definition of a quality start. But only 10.2 percent of all starts had met the HQS criteria. One more inning. One fewer earned run. It makes a big difference.