He has previously played in the CPBL for the Lamigo Monkeys, and in Nippon Professional Baseball (NPB) for the Hokkaido Nippon-Ham Fighters.

Wang debuted with the Lamigo Monkeys of the Chinese Professional Baseball League (CPBL) in 2016.

[citation needed] On September 3, 2016, Wang became fastest CPBL player (122 games) to reach 200 career hits.

[6] On December 7, 2018, Wang Po-jung signed with the Hokkaido Nippon-Ham Fighters,[7][8] agreeing to a three-year contract.

Playing on February 28, 2017, Wang hit a two-run home run against Nippon Professional Baseball strikeout champ Takahiro Norimoto as part of a 3-for-3, three RBI effort.