Manager Buck Showalter said before Monday's game at Minnesota that Andino will be placed on the 15-day disabled list, and the team will recall left-hander Zach Britton to make Tuesday's start against the Twins. Andino's MRI test showed no separation but a strain severe enough to keep him out for up to a month.
Andino started 67 of Baltimore's first 88 games.
Showalter also said right-hander Jason Hammel's arthroscopic right knee surgery went as expected. He'll miss a month, too.