Gsellman (0-1) came out on the short end in his season debut Saturday, giving up three runs on six hits and two walks while striking out seven in five innings against the Marlins.
A popular preseason sleeper after he posted a 2.42 ERA and 42:15 K:BB over 44.2 innings last year, Gsellman suffered through some tough luck in this one, but it's also worth noting his tragic numbers in Triple-A before his call-up -- a 5.73 ERA and 1.49 WHIP. He also wasn't traditionally a prolific whiff artist in the minors. Of course, he's also young at 23 and a hard thrower, so it's not that tough to believe that Gsellman simply learned to control his raw stuff better upon arriving in the majors. Development happens, after all. However, with Steven Matz (elbow) targeting a May return, Gsellman will need to perform well to ensure that he retains a rotation spot. His next outing is scheduled for Thursday on the road against these same Marlins.