Williamson attended Wake Forest-Rolesville High School in Wake Forest, North Carolina. He played for the school\'s baseball team as a pitcher, and was rated the best pitching prospect in the state of North Carolina. He chose to enroll at Wake Forest University to play college baseball for the Wake Forest Demon Deacons. He redshirted as a freshman, and played for Wake Forest as an outfielder. The Boston Red Sox chose Williamson in the 46th round of the 2011 MLB Draft, but he decided to return to Wake Forest for his senior year.\n', '

In the 2012 MLB Draft, the San Francisco Giants selected Williamson in the third round, with the 115th overall selection. He signed with the Giants, beginning his professional career in the Rookie-level Arizona League, hitting two home runs in 19 plate appearances. The Giants then promoted Williamson to the Salem-Keizer Volcanoes of the Class A-Short Season Northwest League, where he hit seven home runs in 125 plate appearances.\n', '

In 2013, the Giants assigned Williamson to the San Jose Giants of the Class A-Advanced California League. He hit 25 home runs for San Jose.\n', '

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