The St. Louis Cardinals have placed starting pitcher Michael Wacha on the 10-day injured list with left knee patellar tendinitis, the team announced Monday.

The move is retroactive to April 19.

As a corresponding move, the Cards have brought up infielder/outfielder Drew Robinson from Triple-A Memphis.

In four starts this season, Wacha is 1-0 with an earned run average of 4.64. This is his seventh season in St. Louis after making his debut in May of 2013.

The Cardinals will open a series with the Milwaukee Brewers Monday night at Busch Stadium.