Blake Treinen will begin the season as Washington’s closer, even though he has only one big league save.

After the Nationals lost Mark Melancon to the San Francisco Giants in free agency, Treinen won the job over Shawn Kelley and Koda Glover.

“Blake has that turbo sinker,” manager Dusty Baker said Thursday. “He may give up a hit or a walk, but he’s always one pitch away from getting two outs with one pitch.”

Pelfrey cut

Detroit released right-hander Mike Pelfrey, who is guaranteed $8 million in the second season of a $16 million, two-year deal.

Pelfrey went 4-10 with a 5.07 ERA last season with the Tigers. He was 2-3 with a 7.94 ERA in three spring training starts and five relief appearances.