This is an official embroidered flag from the 2000 PGA Championship at Valhalla, which has been autographed by that year's Champion, Tiger Woods. The 2000 PGA Championship was the first leg of the "Tiger Slam." This is one of the 500 flags that Tiger autographed for his exclusive autographed provider, Upper Deck Authenticated - this one being #152 of 500.
Certificate of Authenticity from Upper Deck Authenticated (UDA)