EL SEGUNDO, Calif. — Metta World Peace harmed much more than his own tattered reputation when he viciously elbowed Oklahoma City’s James Harden in the head. The Los Angeles Lakers troublemaker also deprived his team of his services as their starting small forward and defensive stopper for at least six playoff games while he serves his 10th suspension in the past decade. The NBA suspended World Peace for seven games on Tuesday for the inexplicable blow that gave Harden a concussion, keeping the former Ron Artest sidelined for most of the first postseason round. World Peace was ejected from Sunday’s...