Red Sox promoted SP prospect Gage Ziehl to Triple-A Worcester.
Ziehl was acquired this offseason in a trade for Jordan Hicks. The 23-year-old has posted a 4.33 ERA, 1.35 WHIP, and 96/18 K/BB ratio in 81 innings for Double-A Portland this season and had a 1.93 ERA in his final three starts before being promoted. Unlike many of Boston’s other starting pitching prospects, Ziehl is smaller in stature and doesn’t have a huge fastball, but he has a true five-pitch mix that could serve him well as rotation depth or a bulk reliever.