Soccer Soccer player Koo Ja Cheol will be making a guest appearance in Running Man, along with Park Ji Sung and girl group f(x)’s Sulli. With posts about sightings of Park Ji Sung and Koo Ja Cheol on the Running Man set in various online community forums, a great deal of interest being received already. Especially, with Koo Ja Cheol’s wedding on June 22, as well as Park Ji Sung’s dating news, many are wondering whether there will be any mentions about the two soccer players’ personal life on the show. In related news, it is said that Koo Ja Cheol, apart from Running Man, has also finished filming SBS's ‘Thank You.’ (source: nate news)