After playing college football for the Colorado Buffaloes, he was selected by the Atlanta Falcons in the eighth round of the 1971 NFL draft.
[3] He played three sports – football, basketball and track and field – and earned 10 varsity letters.
[2][4] In football, he was a fullback and linebacker; he was named all-state at both positions and was given the honor by Associated Press in consecutive years.
[9][10][11][12] He retained his starting role as a junior in 1969 and helped them have a record of 8–3 while winning the Liberty Bowl over the Alabama Crimson Tide.
[10] Havig was traded by the Falcons to the Houston Oilers in September 1976 in exchange for linebacker Guy Roberts.
[28] He earned a real estate license during his NFL career and later went into the insurance business at the suggestion of Falcons quarterback Pat Sullivan.