Both right-handers were injured in Tuesday's loss to the Diamondbacks. Augenstein suffered a strained right groin. Tallet suffered a fracture in his right hand when he and Arizona shortstop Stephen Drew collided on a play at first base (right).
The Cardinals recalled right-handers Fernando Salas and Eduardo Sanchez to replenish the bullpen.
Salas, 25, had a 3.52 ERA in 27 appearances last season for the Cardinals and made three scoreless appearances for Triple-A Memphis. Sanchez, 22, has not played in the big leagues before and hasn't allowed a run over three innings and two appearances for Memphis this season. Last season he had a 2.38 ERA and 58 strikeouts in 53 innings between Double-A and Triple-A.
Augenstein, 24, appeared in five games for the Cardinals, allowing six earned runs (seven total) and 11 hits in 5 2/3 innings. He'd also walked three and struck out six.
Tallet, 33, appeared in five games this season, allowing one earned run (two total) and four hits in 4 1/3 innings. He walked three with four strikeouts.