Aaron Rodgers had a testy exchange with a fan he claimed was an “autograph hound” while at the American Century Championship celebrity tournament in Lake Tahoe on Thursday.

A viral TikTok shows Aaron Rodgers calling a fan an "autograph hound" and refusing to sign memorabilia when the fan couldn't remember who caught a pass in 2005.

Rodgers then berated the fan as an "autograph hound." "You're an autograph hound. Yeah, you are. You can't fool me. You can't fool me," the quarterback said. Read updates to this story at FOXNews.com.

WATCH: Aaron Rodgers refuses to sign for 'autograph hound' after testing his NFL game knowledge Rodgers signed a number of autographs at the American Century Championship, but refused one request ...