Article Photos: OKC THUNDER: Closing the door has been the key 4/21

Oklahoma City's Kendrick Perkins (5) dunks the ball in front of Dallas' Dirk Nowitzki (41) during the NBA basketball game between the Oklahoma City Thunder and the Dallas Mavericks at Chesapeake Energy Arena in Oklahoma City, Monday, March 5, 2012. Photo by Nate Billings, The Oklahoman