Kintzler, Kelley, Madson, Gonzalez, Murphy and if you count players from previous years, Treinen and Desmond.
AJ Cole with NYY, just from this year. Edwin Jackson as well - was in AAA as recently as this season. If you want to go back a few years, Sandy Leon, Brad Peac0ck, Ollie Perez, Kurt Suzuki gives you possibly someone on every team's playoff roster. And Yusmeiro Petit is still out there chucking junk in the Oakland bullpen, as if they didn't have enough former Nats.