While a student at National Taiwan Sport University, Chen signed a 3-year ikusei (development) contract with the Yokohama BayStars of Nippon Professional Baseball (NPB) in February, 2011.

On July 11, 2014, Chen was promoted from development player to a regular team contract (with his uniform number changing from 118 to 59)[4] and made his official professional debut three days later at Mazda Zoom-Zoom Stadium versus the Hiroshima Carp.

[5] In the 2015 preseason, Chen earned a spot in the Lotte starting rotation and made his debut with the team in the opening series in Fukuoka versus the defending champion SoftBank Hawks.

However, by the summer Chen was back with the ichi-gun team on a permanent basis, and in the push for a Climax Series spot he proved invaluable, finishing the regular season with 14 2/3 consecutive innings pitched without an earned run.

[8] Chen subsequently returned to Taiwan, and was selected second overall in the 2021 Chinese Professional Baseball League draft, by the Rakuten Monkeys.