Gsellman exited Tuesday's game against the Marlins with a left hamstring strain, David Lennon of Newsday reports.
Gsellman strained his hamstring while attempting to beat out a groundball in the fourth inning and is now sure to be added to the lengthy list of Mets' pitchers who have been forced to make a trip to the disabled list this season. The team will likely make a decision regarding his status in the very near future.