Oklahoma City flew past the Suns with help from its experienced big man.  The Thunder completed the sweep of the Phoenix Suns on Monday night with a 131-122 Game 4 win. OKC was the only team this year to win its first-round series in just four games, giving the Thunder well-deserved rest going into round two.  Oklahoma City dominated the Suns the whole series, and although it wasn’t in the flashiest way, a big part of this dominance was due to the play of Isaiah Hartenstein. The seventh-year big man showcased his skills in all four games for OKC and was a big part of the Thunder taking this series in just four games.  Hartenstein averaged 11 points per game in the first series for the Thunder, which was capped off by an incredible Game 4 performance where he had 18 points on 71.4% shooting.…