When Jason Kidd left the bench for the operating table, some NBA coaches understood exactly how he felt. The Golden State Warriors have been playing all season without Steve Kerr, who is recovering from back surgery. Kidd joined him on the injured list when he had to step away from the Bucks in December for right hip surgery, an injury that has far more to do with his outstanding 19 years on the court than his 2 1/2 seasons in the coaching box.