Mark Leiter Jr. is from a pitching family — his dad, obviously named Mark, pitched for eight teams in an 11-year career from 1990-2001. His uncle Al had a very good 19-year career and pitched in three World Series for the Blue Jays, Marlins and Mets. And his cousin Jack, Al’s son, was the No. 1 pick (second overall) of the Rangers in last year’s draft and has just begun his pro career at Double-A.
The junior Mark Leiter pitched briefly in MLB with the Phillies and Blue Jays in 2017 and 2018, and the Cubs signed him to a minor-league deal this past winter.