Pierce suffered a ‘stinger’ to his right shoulder on Sunday night and again on Tuesday in practice but was cleared by the team’s training and medical staff while Perkins has missed the last two games with left knee tendinitis.
“It’s good but it’s scary,” Rivers said. “Obviously, you don’t know why you get stingers. Maybe I should call Coach [Bill] Belichick  because it’s a football injury more. We don’t have a whole bunch of stingers in our league that I know of. Obviously, it does concern you because I always think if something like that happens, there’s got to be a reason why but it’s just coincidence, let’s hope.”