Juan Rivera Diaz

Just finished Future Value. A great reminder that competitive advantage in baseball still comes down to people, incentives, and communication—how we filter and disseminate data is important. A few takeaways 🧵

Payton Tolle's mom, Jina, passed away on this day two years ago following a long bout with cancer. “She was my best friend.” Tolle is scheduled to start today for the Boston Red Sox, and will have his mom on his mind and glove at Fenway Park 🤟: telegram.com/story/sports/m…

One of the greatest human beings in the game. I’m happy to call Pepe a friend and a mentor. Someone I can ask anything to.

The Red Sox made it official: Nelson Paulino is joining the club as interim hitting coach. Paulino, 53, is in his 29th season with the Red Sox. He had been Salem's hitting coach for the past bunch years.

Come develop the next generation of @RedSox position players! We have several open roles on our player dev staff. Affiliate Development Coach (multiple positions) Affiliate Defensive Coach (multiple positions) Affiliate Hitting Coach (multiple positions) jobs.lever.co/redsox

Holy Holobetz! @RedSox No. 14 prospect John Holobetz ties his career high with 9 K's across 4 innings for the @PortlandSeaDogs:

After losing a key figure in the pitching program’s turnaround, the Red Sox have entrusted two new directors of pitching with keeping the pipeline flowing. One ran a poker room before he got into coaching. The other is only 26 years old. bostonherald.com/2026/03/01/mlb…

Congratulations to Erik Sibbach ‘26 for tying the all-time wins mark at Stevens set by Scott Picerno ‘08. #SetTheStandard #GoDucks   #AllRise #MACBaseball #d3b #d3baseball

Sometimes I do a poor job of taking a step back. I love living inside the ecosystem that is baseball. So here’s my step back: I’ll be speaking at the MIT Sloan Analytics Conference this year. That’s pretty cool. sloansportsconference.com/people/juan-ri…

Average Bat Speed (MPH) By Count (Competitive MLB Swings in the Bat Tracking Era)

Today I went through every 3-2 pitch Juan Soto saw in the 2025 season. Three things stuck out: 1️⃣ He Doesn’t Expand - he has some of the best strike zone awareness of anyone in the game. When he gets to two strikes, he does not chase or expand the zone. Most players start swinging at pitcher’s pitches. He makes pitchers execute a quality pitch to get him out. 2️⃣ He Competes! -he takes great pride in being a tough out. He battles. He doesn’t give in. He finds a way to get on base. 3️⃣ His Approach - because he’s so willing to use the entire field, his two strike approach does not need to change much. He gets a long look at each pitch because he’s willing to hit the fastball to the opposite field and pull the breaking ball.

Some 'Dogs at the top

Optimizing bat speed by dialing in attack angle using @blastmotion 📈 Free agent OF @SkyeSelinsky works with hitting trainer @jhirsh04 to keep his attack angle in range so he can swing fast without sacrificing efficiency.

Powerful: Tom Brady talks about developing the mental/emotional aspects of being a great QB, rather than just the physical abilities. “At 25 I was good, at 35 I was great, at 45 I was a master of the sport.”

The biggest inefficiency isn’t lack of data anymore. Are we (the organization) speaking the same language? Integration beats silos every time.

If incentives favor short-term wins, you’ll get short-term thinking. Sustainable success comes from organizations that protect long-term process.

Just finished Future Value. A great reminder that competitive advantage in baseball still comes down to people, incentives, and communication—how we filter and disseminate data is important. A few takeaways 🧵

Eduardo Rivera 7 IP/ 8K/ 1 ER. Juego de su carrera en la invernal!

Sometimes progress looks like failing differently.

Parents: Your kids have a .000001% of playing a professional sport Yet through sports done the right way, your kids have a 100% chance of building resiliency, learning life lessons, developing relationships & gaining confidence Sports done the right way are the ultimate teacher