The Mets signed right-hander David Aardsma to a Minor League deal and assigned him to Triple-A Las Vegas on Monday.
Aardsma, 31, opened the year with Miami's Triple-A affiliate in New Orleans, and he went 1-0 with a 2.57 ERA in 10 games (14 innings). He was released on Wednesday.
The veteran hurler was in Spring Training this year with the Yankees, but was designated for assignment on March 29.
Aardsma last appeared in the Majors with the Yankees in 2012, when he pitched in one game and allowed a run in one inning. He saved a combined 69 games for the Mariners over the 2009 and '10 seasons, then had elbow ligament replacement surgery in July 2011.
Aardsma is 13-15 with a 4.22 ERA in 255 games (266 2/3 innings).