Park started to garner attention in 2007 when he pitched a no-hitter against Wonkwang University in the group round of the college national championship (fall league) on September 12.
In 2008, as a senior at Kyung Hee University, Park led his team to win the college national championship (spring league) and earned MVP honors, tossing a two-run complete game victory in the final and posting a 3–0 record and a 0.87 ERA through the tournament.
He racked up a win against Chinese Taipei in the round-robin phase, which assured South Korea a spot in the semifinals.
After the 2010 season, Park was selected for the South Korean national baseball team to compete in the Intercontinental Cup held in Taichung.
He hurled a complete game to lead South Korea to an 8-1 win over Japan in Round 2 of the competition.