It wouldn't be the first time a Detroit athlete flipped off fans after being booed.

Last night, after beating the Pittsburgh Pirates, Joe Nathan exchanges fist bumps with catcher Alex Avila, but Nathan then appeared to make an unseemly gesture toward the sellout Comerica Park crowd. He did it with his hand, and then with his glove.

Watch the video below and judge for yourself. Let us know what you think on our Local 4 Sports Facebook page.