Attended Wake Forest-Rolesville High School in Wake Forest, NC. Played for the school's baseball team as a pitcher, and was rated the best pitching prospect in the state of North Carolina. Enrolled at Wake Forest University and played college ball for the Demon Deacons. The Red Sox chose him in the 46th round of the 2011 draft, but he returned to college for his senior year.
Recalled from triple-A on April 20 to replace Hunter Pence, who was placed on the injured list...Homered in his second AB of the season with SF on April 20 at Los Angeles-AL...the 114.2mph HR was the hardest Giants HR since Statcast started tracking data in 2015 and was tied for the third-hardest opposite field HR by anyone since 2015...Hit three home runs in his first five Major League games this season following his April 20 promotion...Placed on the 7-day injured list with a concussion on April 28 after tripping headfirst into the left field wall trying to make a catch on April 24...transferred to the 10-day injured list on May 7...was reinstated from the injured list on May 25...Was optioned to triple-A on June 23 after hitting .187 in 23 games from May 25-June 22..Batted .269 with seven doubles, 13 home runs, 44 RBI, 31 runs scored and a .905 OPS in 52 games for Sacramento...hit .190 over his final 36 triple-A games before landing on the injured list on August 11...Was placed on the triple-A injured list on August 11 and underwent additional testing for concussion-related symptoms relating to his April injury.
Hit .235 (16-for-68) with three home runs and six RBI in 28 games (19 starts) with SF...Was recalled three separate times...Began the season on the disabled list after he strained his left quad in the fi nal weeks of spring training...Matched his career-high with three hits on Sept. 24 at Los Angeles-NL...went 3x3 with a home run against LHP Clayton Kershaw...Hit .244 (86-for-352) with 21 doubles, 14 HRs and 50 RBI in 94 games with triple-A.
Hit .223 (25-for-112) with six home runs and 15 RBI in 54 games with San Francisco. Made 28 starts (nine in LF and 19 in RF). Missed 27 games from Aug. 2-Sept. 1 with a left shoulder strain. Was activated from the 15-day disabled list (left shoulder strain) on Sept. 1. Hit his first Major League homer on June 8 vs. Boston off LHP David Price…his solo shot broke a 1-1 tie in the eighth inning...he became the first Giants player to have his first big league homer break a tie in the eighth inning or later since John Patterson on Sept. 1, 1993 vs. Atlanta. Went 5-for-19 (.263) with a home run and two RBI as a pinch-hitter. His season came to an end on Sept. 27, with just six regular season games remaining, because of a strained quadriceps he sustained while running down the line in San Diego…was placed on the 60-day disabled list, ending his season.
Appeared in 10 games (nine starts) for the Giants, hitting .219 (7-for-32) with a triple and RBI....Had his contract purchased from triple-A Sacramento Sept. 16....Recorded his first career hit in the fifth inning off Oakland's RHP Sonny Gray on Sept. 25...went 2-for-4 in his first career start...Split the 2015 season between double-A Richmond and triple-A Sacramento, combining to hit .275 with 13 HRs and 73 RBI....Following the season he played for the Scottsdale Scorpions in the Arizona Fall League and batted .370 (27-for-73) with two home runs and 14 RBI in 19 games...helped lead the Scorpions to win the AFL Championship....Was named to the Arizona Fall League 2015 Top Prospects Team.
Hit .318 with seven doubles, three home runs and 11 RBI in 23 games for Class A Advanced San Jose....Had his season cut short after requiring Tommy John surgery on his right elbow on April 29…orthopedist Dr. James Andrews performed the surgery....Had been dealing with the injury to his throwing elbow all season.
Had the most impressive season of any Giants hitting prospect at a full-season affiliate, leading the organization in home runs (28) and RBI (89)...Was promoted to Class A Advanced San Jose in just his second professional campaign and hit .292 (152-for-520) with 25 home runs and 89 RBI in 136 games...Among the California League leaders he ranked tied for third in home runs and games played, tied for fourth in hits, fourth in total bases (262) and fifth in runs scored(94)...Finished 2013 ranked tied for third on San Jose's single-season home run list...Was awarded SJ's co-team MVP award (wth Ty Blach)...Was named California League Player of the Week for Aug. 19-26 after going 16-for-31 (.516) with four home runs and 12 RBI...Enters the 2014 season rated by Baseball America as the fifth best prospect in the Giants' minor league.
In the 2012 season, Williamson began his professional career playing four Rookie League games in Arizona…he hit two home runs in only 19 plate appearances...Later that season, was moved to short-season Salem-Keizer in the Northwest League and hit seven home runs in 125 plate appearances.