Bettis, who saw big league time as a starter and a reliever last season, struck out two in an impressive eighth inning of the nightcap against the Mariners -- and has thrown five scoreless innings. Some have speculated Bettis, a second-round pick out of Texas Tech in 2010, could be developed into a closer.
There could be a middle relief spot open if Morales, who has been a reliever most of his career, makes the starting rotation.
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.