Nelson Cruz was shifted to DH, Seth Smith moved from left field to right and Dustin Ackley, who was not scheduled to start, moved into the lineup in left field.
Morrison is hitting .245 with six home runs and 14 RBIs in 52 games and is riding an 11-game hitting streak, during which he's batted .333 with a double and four walks.
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB, read his Mariners Musings blog, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.