Zambrano had just thrown a ball to Eli Whiteside after an RBI single by Miguel Tejada when he began stretching his back.
CARDINALS: Filled out their 25-man roster by purchasing the contract of right-hander Brandon Dickson from Triple-A Memphis.
Dickson replaces former All-Star closer Ryan Franklin , who was given his unconditional release on Wednesday.
When he gets into a game, Dickson will become the eighth player to make his major league debut with the Cardinals this year.
METS: Outfielder Willie Harris has been put on the bereavement list after his wife went into premature labor and their baby died.
Manager Terry Collins offered his condolences to Harris and his wife, Trey , before Thursday's game at Detroit. Harris had gone on the paternity list Wednesday when his wife went into labor.
MARLINS: The team will open their new $515 million ballpark against St. Louis on April 4, a person familiar with next season's draft schedule told The Associated Press.