The Final Boss will not return in 2019.

Veteran right-hander Seunghwan Oh, 37, will undergo season-ending surgery to clean up loose particles in his right elbow, manager Bud Black said. The arthroscopic surgery will take place his native South Korea.

After coming to Colorado via trade with Toronto last July, Oh was instrumental to the Rockies’ playoff run down the second half of 2018, posting a 2.53 ERA in 25 games for the Rockies.

But this year has been a much different story. Oh has a 9.33 ERA in 21 games, and has been on the injured list with an abdominal strain since June 10. He is making $2.5 million this year, and is arbitration eligible in 2020.