The Pittsburgh Pirates drafted Mason Martin in the 17th round of the 2017 MLB Draft. At the time, no one would have thought that the Pittsburgh Pirates 17th round pick would become a Top 20 prospect. However, Martin has put together a really solid minor league career and this year broke out as one of the top power prospects in baseball.
The left-handed first baseman Martin has always shown plus power. Across 2017 and 2018 he hit 25 home runs along with 54 extra-base hits in 143 total games. This, of course, was for the Pittsburgh Pirates rookie-level teams which play short season schedules.