Butler was born in Savannah, Georgia. He attended Redan High School in Stone Mountain, Georgia, outside Atlanta where he played football and soccer. He loved to play sports and play guitar. During Butler's senior year, Redan played Marist High School for the state championship. In the closing moments of a very close game, Butler kicked a 44-yard field goal that gave the winning margin to the Redan Raiders. Attending the game was Georgia Bulldog Head Coach Vince Dooley. In a brief, impromptu exchange outside the door to the visiting locker room, Dooley congratulated Butler and pointed out that Bulldog kicker Rex Robinson would be graduating at the end of the school year. Georgia, Dooley said, would be needing a new kicker. The next year, Butler began his illustrious career as the Bulldog's kicker.
In his 11 seasons with the Bears, Butler became the team's all-time leading scorer with 1,116 points, easily surpassing the old record of 750 points held by Walter Payton. Butler held that record until October 11, 2015, when kicker Robbie Gould collected his 1,118th point. Butler was also part of the 1985 Chicago Bears team who won Super Bowl XX, setting a rookie scoring record with 144 points during the season and kicking three field goals in the Super Bowl.
When he was released by the Bears after the 1995 season, he was the last remaining holdover from the Super Bowl XX team. Butler finished his 13 NFL seasons with 265 of 361 field goals (73%) and 413 of 426 extra point attempts, giving him 1,208 total points.
While playing for the Chicago Bears in 1985, Butler set a record for the most points scored by a player during his rookie season. His record of 144 points stood until 2014, when it was broken by place kicker Cody Parkey of the Philadelphia Eagles. Butler set his 1985 record by making 31 field goals and all of his 51 extra point attempts.
Kevin is married to Cathy Butler. They have three children together: Katie Scarlett (goes by Scarlett), Drew and Savannah Butler. Scarlett and Drew attend the University of Georgia; Savannah was a student at Marymount Manhattan and is a ballet dancer. Drew was the starting punter for the Bulldogs and lead the nation in punting with an average of 49.7 yards per punt and a net average of 44.5 yards per punt. In 2012 the Pittsburgh Steelers signed Drew as an undrafted free agent and he currently plays for the Arizona Cardinals.