Mark Kelso is a former American football player and current broadcaster. He was a member of the Bills teams that appeared in four consecutive Super Bowls from 1990-1993, and currently serves as the color commentator for the Buffalo Bills Radio Network.
Kelso played in eight NFL seasons and his entire career with the Buffalo Bills from 1986-1993. His peak performance as a pro came during the 1988 season when he had intercepted 7 passes for 180 yards and one touchdown. Kelso appeared in four consecutive Super Bowl appearances for the Bills from 1990 to 1993. He was well known for wearing a "pro cap" on his helmet which was used to reduce the risk of concussions.