He played a number of tournaments on the Korean Tour, his best finish being joint runner-up in the 2017 T-up Gswing Mega Open.

[2] He won the first event of the season, The Bahamas Great Exuma Classic, becoming, at 19 years, 292 days, the second youngest winner in Web.com Tour history.

[4] On 22 September 2019, Im lost the Sanderson Farms Championship in Jackson, Mississippi in a playoff to Sebastián Muñoz.

[5] In December 2019, Im played on the International team at the 2019 Presidents Cup at Royal Melbourne Golf Club in Australia.

[6] On 1 March 2020, Im won The Honda Classic at PGA National Resort and Spa in Palm Beach Gardens, Florida, with a final round of 66 and an overall score of −6.

On 10 October 2021, Im won the Shriners Children's Open at TPC Summerlin in Las Vegas, Nevada for his second PGA Tour title in his 100th start.