The St. Louis Cardinals' bullpen took a hit on Sunday, as reports indicate reliever Zack Thompson will be out for at least 3-4 weeks.

Cardinals left-hander Zack Thompson suffered a tear in his left lat muscle, president of baseball operations John Mozeliak told reporters (including Derrick Goold of the St. Louis Post-Dispatch) today. Thompson will be shut down and then re-evaluated in three or four weeks, so Thompson will surely start the season on the Cards’ injured list.

Cardinals left-hander Zack Thompson suffered a tear in his left lat muscle, president of baseball operations John Mozeliak told reporters.