 In September 2001, Kalk moved to Los Angeles and joined the band Warsaw Poland Brothers on the Bass guitar.It was the beginning of his career with Warsaw that he received the nickname "Jayder" from Jesse "Monkeybone" Ribyat, jokingly combining "Jay" with his Midwest accented phrase, "Hey There".The band toured 275 days a year from NYC to Waikiki and earned the underground reputation as the hardest working band in America.