Complex sentence: Casey began his career in 1995, making appearances in WCW under the names Steve Casey and K.C. Sunshine, but did not become well known till he posed for Playgirl, in 1997.
Split into simpler sentences: Casey began his career in 1995, making appearances in World Championship Wrestling (WCW) under the names Steve Casey and K.C. Sunshine. He did not become well known till he posed for "Playgirl" in 1997.