Jeremy Hefner is the youngest pitching coach in MLB. He didn’t get his first job in an MLB front office until 2018 when he became an advanced scout for the Minnesota Twins. By 2019, he was the assistant pitching coach in Minnesota. Now he’s the New York Mets pitching coach.
The reason for his meteoric rise as a coach is his understanding of analytics. He dove deep into analytics and how to coach them since retiring. He’s now considered one of the best analytically-minded pitching coaches in baseball.
He’s taken that mindset and put it to work early on in his tenure with the Mets.