Doc Rivers’ Gatorade soaked shirt from Game 6 of the NBA Finals is on the auction block. After appearing on the Dennis and Callahan Show on WEEI last Thursday, the Celtics head coach gave the shirt, which is autographed by Doc and Paul Pierce, to WEEI. Michael Holly started the bidding at $750 and as of this weekend, bidding was up to $9,000. All proceeds will go to The Shamrock Foundation. Bidding will end at 10 AM on Tuesday. Bids will be taken on air throughout the day on WEEI.