Wacha activated ahead of his start against Nats; Helsley sent back to Memphis

Michael Wacha was 1-0 with a 4.64 ERA in his first four starts this season before the injury.
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Michael Wacha is back with the Cardinals after a stint on the 10-day injured list.

The Cardinals activated Wacha on Monday ahead of his scheduled start against the Washington Nationals. In a corresponding move, the team sent rookie pitcher Ryan Helsley to Memphis (AAA).

Wacha hit the IL with left knee patellar tendinitis. He was 1-0 with a 4.64 ERA in his first four starts this season before the injury.