Last season, Luke Combs and his fantasy football league came up with quite the punishment for finishing in last place: And that punishment was exacted during the singer’s Cincinnati, Ohio show on Saturday (Aug. 3.) In between songs, Combs paused his set to explain that he and his league had agreed that the losers would come out onstage and sing with him in front of thousands of people. “I’ve been in a fantasy football league with some of my best friends from high school for 12 years now,” he told the crowd. “Last year we decided that whoever lost was gonna have to come onstage and sing with me…