Ronald "Mac" McDonald is a co-owner and sheriff of Paddy's Pub and generally the pub's most active manager. He is roommates with his best friend from high school, Dennis Reynolds, and has been best friends with Charlie Kelly since childhood. Mac is a member of The Gang which also includes Dee Reynolds and Frank Reynolds. Mac gets upset at injustices, but will pounce on any opportunity he sees as a fair chance to bang or make money. He was proud of his body and weight gain during Season 7, and is secretly ashamed of returning to his regular size.