Johan Santana's pectoral injury has at no point been considered severe, but the Mets are still going to play it safe:
Mets will skip Johan on Tuesday
Santana recently threw a bullpen that went pretty well, but at 67-70 and 11 games out of the Wild Card, the Mets have no reason to hurry things with their ace pitcher who's still under contract for another three years. Odds are he'll return to the rotation for the next turn.