Mets RHP Robert Gsellman threw seven innings Wednesday against the Phillies, during which he allowed three runs and seven hits while striking out seven batters.
Gsellman, who still qualifies as a rookie, later told reporters that he spent time this past week working with pitching coach Dan Warthen to gain better command of his slider.
"I've been working on it consistently and today was the best it has been," he added.
Gsellman allowed a run in both the fourth and fifth innings, but controlled the damage in the latter frame. With the bases loaded and two outs, he got Maikel Franco to ground out to end the inning and keep the deficit at two.