He attended Imlay City (Michigan) High where he received All-Michigan Athletic Conference honors as a sophomore, junior and senior. He was the Detroit News All-State performer as a junior and senior and the three-time team captain. He rushed for a combined 1,827 yards and scored 38 touchdowns as a junior and senior. He also caught 55 passes for 1,201 yards and 19 scores. He was lettered in four sports in high school.
Nicknamed "Circus Kircus" by Grand Valley Lanthorn sports editor Michael Kohon for his acrobatic catches, he is the son of Anthony and Elaine Kircus. He grew up in Imlay City, Michigan.
On May 21, 2007, Kircus was arrested on an assault charge, in connection with an altercation at a party the previous evening.