The Red Sox have made John Soteropulos an assistant hitting coach, reports Jen McCaffrey of The Athletic. Soteropulos had been a minor-league hitting coordinator since 2023. Before joining Boston’s organization, Soteropulos was a trainer at Driveline Baseball.

McCaffrey adds that Soteropulos worked with minor leaguers on boosting bat speed and exit velocity during his time as a hitting coordinator. That group included top prospects Kristian Campbell, Roman Anthony, and Marcelo Mayer. The trio debuted in 2025, with varying results.

Campbell made the team out of camp. He hit .301 through April, then fell off a cliff in May, batting .134. He continued to scuffle into June and found himself back in the minors. Mayer got the call at the end of May. He showed big power, though it came with strikeout issues. A wrist injury ended his season in July. Anthony had by far the most success of the bunch. He joined the big-league club a few weeks after Mayer. Anthony shook off a slow June to put up a massive July and August. He posted a .920 OPS and a 156 wRC+ from the beginning of July through the first week of September, when he injured his oblique. The strain would end his season.

Boston’s hitting coach is Pete Fatse. He joined the team as an assistant hitting coach in 2020, before being promoted to the head job in 2022. Dillon Lawson is also joining the staff as an assistant hitting coach. He served as hitting coach for the Yankees from 2022 until midway through 2023.

Add Soteropulos to the growing list of employees to make the jump from Driveline to big-league organizations. Driveline founder Kyle Boddy spent time with multiple teams, including as a consultant with the Red Sox. Eric Jagers, the company’s former Manager of Technical Development, is currently the Vice President of Pitching for the Mets. Sam Briend, who led Driveline’s pitching development program in Seattle, has been the Yankees’ Senior Director of Pitching since 2019.