Newly acquired Adalberto Mejia arrived at Busch Stadium in time to be activated Wednesday night, and the Cardinals made room for the lefthander by optioning Daniel Ponce de Leon to Triple-A Memphis.
In 17 games with Minnesota and the Los Angeles Angels, Mejia was 0-2 with a 7.32 ERA this season. He has struck out 21 and walked 13.
"He has a big arm and has been touching 95 (mph) consistently," general manager Mike Girsch said.
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