The Athletics announced Sunday that reliever Chris Bassitt would be sent down to Triple-A Nashville in order to make room for recently acquired reliever Edward Mujica, per the San Francisco Chronicle.
Bassitt has appeared in five games for Oakland this season, allowing six runs in 10 2/3 innings of work. Mujica was designated for assignment by the Red Sox earlier this week, and the Athletics acquired the veteran in a trade with Boston on Saturday.
Mujica has allowed seven runs on 15 hits in 13 2/3 innings this season, but the A's are desperate for bullpen help, as he will become the 14th reliever used by the team this season.
"Depending on availability, he's been pretty versatile in the bullpen where he's pitched before, anywhere from real late to middle of the game," manager Bob Melvin told MLB.com.