Thomas John Dempsey (January 12, 1947 – April 4, 2020) was an American professional football player who was a placekicker in the National Football League (NFL) for the New Orleans Saints, Philadelphia Eagles, Los Angeles Rams, Houston Oilers and Buffalo Bills. Unlike the "soccer-style" approach which was becoming more widely used during his career, Dempsey's kicking style was the then-standard straight-toe style. With the Saints in 1970, he made a 63-yard field goal, setting an NFL record which stood for 43 years.

Dempsey was born in Milwaukee and attended high school and college in Southern California. He was born with no toes on his right foot and no fingers on his right hand. To accommodate his foot structure, Dempsey wore a custom, flat-front kicking shoe that had no toe box.

Dempsey was born without toes on his right foot and no fingers on his right hand. He wore a modified shoe with a flattened and enlarged toe surface. The custom-made $200 (equivalent to $1,658 in 2025) shoe generated controversy about whether such a shoe gave a player an unfair advantage. When reporters would ask him if he thought it was unfair, he said, "Unfair, eh? How 'bout you try kickin' a 63-yard field goal to win it with 2 seconds left an' yer wearin' a square shoe, oh yeah, and no toes either." Additionally, ESPN Sport Science analyzed Dempsey's kick and determined his modified shoe gave Dempsey no advantage.

The league made two rule changes in the subsequent years to discourage further long field goal attempts. The first was in 1974, which moved the goal posts from the goal line to the back of the end zone, adding ten yards to the kick distance, and awarded the ball to the defense on a missed kick at the spot from where the ball was hiked. (This was changed in 1994 to the spot of the kick.) Then, in 1977, the NFL added a rule, informally known as the "Tom Dempsey Rule", that "any shoe that is worn by a player with an artificial limb on his kicking leg must have a kicking surface that conforms to that of a normal kicking shoe."

Dempsey is most widely known for kicking a 63-yard field goal as time expired to give the Saints a 19–17 win over the Detroit Lions on November 8, 1970, at Tulane Stadium in New Orleans. Prior to 1974, the goal posts in the NFL were on the goal lines instead of the end lines. With time running out in the game, the Saints attempted a field goal with holder Joe Scarpati spotting at the Saints' own 37-yard line. The snap from Jackie Burkett was good, and Dempsey's kick just barely cleared the crossbar to make the try good. The win was one of only two for the Saints that season.

With the kick, Dempsey broke Bert Rechichar's NFL record for longest field goal by seven yards. His record was tied three times—by Jason Elam with the Denver Broncos in 1998, Sebastian Janikowski with the Oakland Raiders in 2011, and David Akers with the San Francisco 49ers in 2012—before it was broken on December 8, 2013, by Matt Prater, who hit a 64-yard field goal.

Since Dempsey was the only kicker to make a field goal from more than sixty yards prior to the relocation of the goal posts, he remains the only player in NFL history to successfully kick a field goal from beyond his own team's 40-yard line.

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