In 2011, Feliz was 2–3 with a 2.74 ERA and 32 saves (5th in the American League and tied for 9th-most in Rangers history). During Game 6 of the 2011 World Series, with two outs, two strikes, and two runners on, Feliz blew a save as he surrendered a 2-run triple to David Freese, who would then homer later to seal a Cardinals 10–9 win in the 11th inning. The Rangers then lost their second straight World Series appearance after losing Game 7 to the Cardinals 6–2.