The 21-year old Feliz was recently called up to bolster the Ranger bullpen as the team heads toward a showdown with the Red Sox for the AL Wild Card. Seen long-term as a starter, Feliz is following the Joba Chamberlain/David Price plan and getting his feet wet in the 'pen. His fastball has been clocked in the triple digits and he has 16 strikeouts in 8.2 innings pitched. Even more impressive, he's only allowed two hits (although one was a home run) and hasn't walked anyone, despite a history of erratic control.
A quick check on Yahoo! indicates he's only starting in 15% of leagues. Especially if you are playing in a keeper league, check to see if Feliz is available to help your team in the stretch run and beyond.