Shaun Marcum recently received a cortisone injection for a right shoulder impingement according to Terry Collins. Collins told reporters Wednesday that this injury is not considered serious as Marcum goes through this type of injury every spring. Collins also said he expects Marcum to go his next turn in the rotation next week. This is definitely something to keep an eye on however as any time you hear the words “Shaun Marcum shoulder injury” in the same sentence. The Mets cannot afford to lose Marcum this close before the season already down one starter.