Article Photos: OKC Thunder: Team's reputation gets tougher with Kendrick Perkins' arrival, players' maturity 27/50

Dallas' Dirk Nowitzki (41) works the ball against Oklahoma City's Nick Collison (4) during Game 2 of the first round in the NBA basketball  playoffs between the Oklahoma City Thunder and the Dallas Mavericks at Chesapeake Energy Arena in Oklahoma City, Monday, April 30, 2012.  Oklahoma City won, 102-99. Photo by Nate Billings, The Oklahoman