• Lowry scores final-round 66 at Firestone CC in Akron, Ohio• Bubba Watson, Justin Rose and Jim Furyk his closest pursuersIreland’s Shane Lowry held off the challenge of three major champions to claim the biggest victory of his career in brilliant fashion in the WGC-Bridgestone Invitational at Akron, Ohio, on Sunday.Lowry carded a flawless final round of 66 at Firestone Country Club to finish 11 under par, two shots ahead of the double Masters champion Bubba Watson, with Justin Rose and Jim Furyk another two shots back after disappointing rounds of 72.