Oakland selected the contract of catcher Luke Montz from Sacramento of the Pacific Coast League and recalled right-hander Dan Straily from the Triple-A team before Wednesday's series finale against the Los Angeles Angels.
Crisp strained his left hamstring trying to beat out an infield grounder in the 13th inning of Monday's 10-8, 19-inning win over the Angels, and the roster move was made retroactive to Tuesday. Anderson aggravated his right ankle in the 18th inning trying to field a ball.
Crisp is hitting .283 with five homers and 12 RBIs in 24 games and is second in the AL with 24 runs. Anderson is 1-4 with a 6.21 ERA in six games.
Montz has not played in the major leagues since 2008 with Washington.