The Tampa Bay Rays are promoting left-handed pitching prospect Joe Rock to the major leagues. In a corresponding move, the Rays are designating right-handed pitcher Forrest Whitley for assignment. Rock is considered the No. 21-ranked prospect in the system on MLB.com. The left-hander has yet to earn the call to the majors since being selected in the 2021 MLB Draft out of Ohio State. This season, Rock has appeared in 15 games for Triple-A Durham (14 starts) and posted a modest 4.81 ERA with a 1.49 WHIP. During this stretch, Rock has struck out 63 batters and allowed a high 30 walks. With the Tampa Bay rotation full, fantasy managers should expect Rock to be deployed out of the bullpen. Given that he will likely have a low-leverage role, he is best to leave on the waiver wire.