Jansen made his Cactus League debut in Thursday's 4-2 matchup with the Indians. He threw one inning, allowing a run on two hits while striking out one in a 4-2 win.
Fresh off a monster contract renewal, Jansen is looking to repeat his elite closer numbers from 2016. He was the only full-time closer who was able to reach the 100-strikeout mark last year. Jansen should be considered the consensus top closer in most fantasy formats due to his track record, job security and durability.