Cardinals general manager John Mozeliak said Monday that pitcher Adam Wainwright has been diagnosed with a torn Achilles in his left foot, the St. Louis Post-Dispatch reports.
Wainwright will undergo surgery Thursday and miss the remainder of the season, the team announced. He suffered the injury while stumbling out of the batter's box during an at-bat in his last start. The recovery time for the procedure is nine-to-12 months, and the team is optimistic about his return.
Wainwright's season comes to a close after four starts. He went 2-1 with a 1.44 ERA and 18:3 K:BB ratio in 25 innings.
The Cardinals are expected to look internally to fill the rotation hole the injury presents. Marco Gonzales and Jaime Garcia are two long-term options to enter the rotation, but both are currently dealing with injuries.