Jansen (1-0) struck out the only batter he faced and earned the win against the Rockies on Saturday.
Jansen whiffed Elias Diaz to close the top of the ninth inning, and Cody Bellinger's walkoff solo shot made Jansen a winner. The 32-year-old closer has racked up seven saves with a 0.79 ERA, 0.71 WHIP and 14 strikeouts across 11.2 innings this season.