Mack Donald Jenkins (born April 22, 1965) is a professional baseball coach for the Cincinnati Reds
Jenkins was a minor league baseball pitcher in the Reds organization from 1986 through 1988. He was the winning pitcher in the game that ended the longest winning streak in the history of professional baseball.
Jenkins served as pitching coach for the Louisville Bats of the Triple-A International League. He was named assistant pitching coach of the Reds in 2012.