In 1983, Kelso recorded 141 tackles, third all-time in a single season for a player of any position at William & Mary and the most ever by a safety.
From 2006 until 2018, Kelso served as the color commentator for Buffalo Bills radio broadcasts on both WGRF 96.9 FM and WGR 550.
He was the development director at Saint Mary's High School in Lancaster, New York, as well as its varsity football defensive coordinator, from the 2003 to 2010 seasons.
Kelso left his position at Saint Mary's in order to work with a Georgia-based company named The Hanson Group.
Prior to that he taught fifth grade at Main Street Elementary School in East Aurora, New York.