Diamondbacks acquire reliever A.J. Puk from Marlins

PHOENIX — The Arizona Diamondbacks added left-handed pitcher A.J. Puk in a trade with the Miami Marlins on Thursday, signalling that the D-backs will be a buyer at the rapidly approaching trade deadline.

The 29-year-old Puk should be useful in the back end of the D-backs’ bullpen. He’s been a solid reliever the past three seasons and has a 4-8 record with a 4.30 ERA in 32 appearances this season.

The D-backs — defending National League champions — have improved this season after a slow start and own a 53-50 record.

The Marlins received minor league third baseman Deyvison De Los Santos and outfielder Andrew Pintar. The 21-year-old De Los Santos is hitting .325 with 28 homers and 84 RBIs while playing in Double-A and Triple-A this season.

The MLB trade deadline is Tuesday.