Randy Johnson got a cortisone injection in his wrist Tuesday and will miss his scheduled start Friday with tendinitis in his left forearm. "Just had some inflammation in there," Johnson said. "I don't know how I got it. I've never had it in my career in this area. It was swollen after my Pittsburgh start and the next day it was swollen again. I just had [hand specialist] Don Sheridan see my wrist and he evaluated it and said it was nothing to be alarmed about -- he'd seen it before. But he thought it would be in my best interest to let it rest for at least one start. It's already better today. It's not as sore, so I'm shooting for next Wednesday." Arizona manager Bob Melvin said that the club was "leaning" toward having Edgar Gonzalez start in Johnson's place, but whether Gonzalez is needed in relief before Friday could be a factor.