After experiencing forearm tightness in the spring and getting off to a slow start in the regular season, the Boston Red Sox optioned right-hander Brayan Bello to Triple-A Worcester.
In a corresponding move, the Red Sox recalled left-hander Brennan Bernardino.
Bello, 23, was late to join the Red Sox's rotation after he was shut down in the spring and when he did join the club had a 9.82 ERA in two starts. The most recent of those came Sunday when he gave up three runs on five hits in 4 2/3 innings to the Milwaukee Brewers.