Park had mediocre freshman and sophomore seasons, but finally showed signs of promise in his junior year in 2010, when he led the team attack alongside Ko Jong-wook, posting a .299 batting average.
When Park, the 2011 college batting champion, made himself eligible for the KBO draft after his senior season at Hanyang University, many expected him to be an early-round pick.
However, some scouting reports highlighted his lack of prototypical height and inability to hit home runs and questioned his defensive abilities, and Park was not called in the 2012 KBO Draft.
Park made his first KBO League appearance on September 13, 2013, as a pinch runner for Choi Hyoung-woo, who had singled, but did not score.
In 2014 Park had a breakout season, making 119 appearances as a starting center fielder for the Lions, and batting .297 with 31 RBIs and 36 stolen bases.