Gsellman relieved an injured and ineffective Jon Niese in the first inning Tuesday and tossed 3.2 scoreless innings to pick up the win in his Major League debut.
Gsellman allowed both inherited runners to score while walking three and allowing two hits in his outing. But he was able to dance in-and-out of trouble, striking out two in the effort. If Niese's knee injury lands him on the disabled list as expected and Steven Matz misses more than one start with his shoulder injury, Gsellman could slot into the team's starting rotation. If not, he will remain a long man out of the bullpen.