Kang retained his PGA Tour card for 2012, helped by finishing tied for third place at the Children's Miracle Network Classic, ending the season 120th on the money list.

In October 2011 he was a runner-up in the Shinhan Donghae Open, a Korean Tour event, finishing a stroke behind Paul Casey.

At the 2016 AT&T Pebble Beach National Pro-Am, Kang shot a course record 60 during the second round at the Monterrey Peninsula course.

Two weeks later a good result in the RBC Heritage moved him into the top-100 of the world rankings for the first time, receiving an entry to the 2017 PGA Championship.

In July 2018, Kang was involved in a rules controversy at the Quicken Loans National tournament when he was accused of cheating by his playing partner Joel Dahmen.

The exact line his ball had taken en route to its final resting place thus came under careful scrutiny.

There was a discussion with a rules official, Dahmen and Kang which reached an impasse as another group played through.

After further discussion, Kang conceded that his ball more likely crossed the hazard 35 yards from the pin rather than his first suggestion.

The PGA Tour released a statement indicating that they regarded the issue as closed: "With no clear evidence to prove otherwise, it was determined by the official that Kang could proceed with his fourth shot as intended, following a penalty stroke and subsequent drop.