The San Francisco Giants drafted Mac Williamson in the third round of the 2012 draft out of Wake Forest University. In his last year at Wake Forest he hit .286 with 17 home runs, 52 RBIs and stole 12 bases.
He was sent straight to the San Francisco Giants High-A team in 2012 where he hit .342 with 7 home runs in 114 at-bats. Then he played in the Arizona Fall League later that year, but hit just .176 with 2 home runs in only 17 at-bats.
He spent all of 2013 at High-A where he hit .292 with 25 home runs, 89 RBIs and 94 runs, which definitely raised some eyebrows. Williamson then started the 2014 season at High-A again, but his season ended after just 23 games to have Tommy John Surgery.
In 2015 he started the year in Double-A hitting .293 with 5 home runs in 259 at-bats, and then moved up to Triple-A where he hit .249 with 8 home runs in 189 at-bats. The San Francisco Giants called him up in September and gave him 32 at-bats. Williamson hit .219 with 8 strikeouts and zero walks during that limited playing time.
Last year he bounced back-and-forth between Triple-A and the big leagues. At Sacramento he hit .269 with 11 home runs in 208 at-bats. At the big league level he hit .223 with 6 home runs in 112 at-bats.