Acquired: Via trade from the Red Sox on July 31, 2017, along with RHPs Gerson Bautista and RHP Stephen Nogosek, for RHP Addison Reed (NYM). Originally drafted in the second round of the 2012 MLB First-Year Player Draft (BOS).
Most Recent Stats at Time of Debut
|6-3 with a 2.94 ERA and seven saves in 41 games between Portland (Double-A), Pawtucket (Triple-A) and Las Vegas (Triple-A), striking out 66 and walking 17 in 52 innings while allowing 48 hits for a .240 BAA.|
Info & MLB Debut Date
Contract purchased from Las Vegas on September 1 when rosters expanded.
MLB Debut Date: 09/02/17
|September 2, in a 12-8 loss to the Astros in the first game of a doubleheader. The fourth of six pitchers, he allowed two runs, one of them earned, one three hits in two-thirds of an inning without walking or striking out a batter. Of 16 pitches thrown, 13 of them were for strikes. Coming on in the bottom of the seventh in relief of fellow debutante right-handed reliever Jacob Rhame, he gave up three hits in a row: A double to left by J.D. Davis, a single to center by Juan Centeno, and an RBI single to center by Tomy Kemp which plated Davis. George Springer then flew out to right, advancing Centeno to third. Centeno was thrown out at home when the next batter, Alex Bregman, reached on a fielder's choice on a grounder to third, and Kemp advanced to second. Tyler White then hit a grounder to third but Mets third baseman Asdrubal Cabrera made a throwing error allowing Kemp to score and Bregman to move to third. Left-handed reliever Josh Smoker then came in for Callahan and struck out Josh Reddick swinging to end the inning.|
|Debuting just moments after his new bullpen-mate Rhame, the pair also joined the Mets farm system around the same time, with Callahan coming over from the Red Sox at the trade deadline. Originally drafted out of high school in Dillon, S.C., his fantastic spring training catapulted him into the picture with the Sox before he was reassigned on March 31. He'd built upon a strong second half of 2016, when he posted a 2.23 ERA down that stretch, in his first season in the bullpen during which he'd posted a 3.29 ERA at Salem (High A), striking out 63 while walking 38 and allowing 53 hits in 66 innings over 36 games. Armed with a hard slider as his out pitch and a fastball in the mid 90s, the pen seemed a good destination after two forgettable campaigns at Greenville (Class A) in 2014 and 2015 as a starter.|