Their contributions were doubled with the snap of a finger as actor and longtime Reds fan Charlie Sheen matched the initial city's donations to double the dollars and bring the total to $100,000.
Brennaman made a bet with bench coach Chris Speier that if the Reds ever hit a 10-game win streak, he would go bald. The Reds accomplished the feat July 29, in Colorado, and Brennaman stood by his word.
Cincinnati raised more than double the $20,000 required to make Brennaman shave his head on the field Friday night, and Sheen announced his own $50,000 contribution Sunday afternoon on the big screen of Great American Ball Park.
Sheen has been in attendance for all three games against the Pirates this weekend and visited with the players before Saturday's game.
He joked that his next step would be to run for mayor of Cincinnati.