Cardinals first baseman Lance Berkman will be part of home-opener festivities today but won't be part of the defending World Series champions' lineup this weekend.

A magnetic resonance imaging confirmed on Thursday that Berkman suffered a slight (Grade 1) strain of his left calf in the Cardinals' 7-1 win over the Cincinnati Reds on Tuesday at Great American Ball Park.

Berkman sustained the injury while motoring around second base en route to a triple.