Isringhausen, 38, last pitched in the majors in 2009 with the Rays before undergoing Tommy John surgery. He signed a minor league deal with Cincinnati last summer and threw just 5 2/3 innings for the Reds' Triple-A affiliate. Isringhausen threw a bullpen session for the Reds last month and another for the Mets today, so obviously the Mets brass liked what they saw from the 14-year veteran.
Isringhausen was originally drafted by the Mets in the 44th round of the 1991 draft, and he pitched for the club from 1995-99 before being traded to Oakland in July 1999. It was after leaving the Mets that "Izzy" blossomed into a top closer, accumulating 272 saves and a 2.81 ERA between 2000 and 2008 with the A's and Cardinals.