For the Mets, the fleeing few have been Pat Misch and Mike O’Connor.
Misch had been with the Mets since 2009, claimed off waivers from the San Francisco Giants. The lefty enjoyed two respectable campaigns with the Mets, owning a 4.00 ERA, 1.32 WHIP, and a 2.00 K/BB in 96.6 innings from 2009 to 2010. However, Misch couldn’t find a fit with the team in 2011, leading to multiple DFA’s and a forgettable 10.29 ERA, 2.14 WHIP, and 1.25 K/BB in just 7 innings.
Mike O’Connor was first signed by the Mets in 2010, but never pitched above Triple-A. But in 2011, the 30 year-old lefty was called-up on May 7, and pitched well for the Mets–posting a 2.70 ERA, 1.20 WHIP, and 2.67 K/BB. Despite his success at the Major League level, O’Connor only posted a 5.22 ERA, 1.45 WHIP, and 3.47 K/BB in 60.3 Minor League innings.
It’s possible either or both pitchers can still be re-signed, but it’s fair to say both are very replaceable.