From April 2009 to December 2010, Kim was a cast member of Invincible Baseball Team, a variety-reality show that aired during Saturday Challenges; he was chosen as MVP for several weeks. In June 2009, he took part in another reality show Mnet Scandal, where a Celebrity dates a non-celebrity for a week. In July 2009, he made his stage debut in the musical Youthful March (젊음의 행진), along with his T-Max co-member Park Yun-hwa. Kim tested positive for H1N1 in November 2009 and had to cancel a fan meeting event in the Philippines.