Keith Thurman
Lubin made his professional debut on November 2013. After 17 wins, 12 of them by way of knockout, Lubin faced Jorge Cota in a WBC super welterweight title eliminator. The fight was scheduled for 4 March 2017 as a co-feature to Keith Thurman-Danny García. Cota went down on the fourth round, he would rise but the referee deemed him unable to continue. With the win, Lubin became Jermell Charlo's mandatory challenger.