Mark John Calcavecchia (born June 12, 1960) is an American professional golfer and a former PGA Tour member. During his professional career, he has won 13 PGA Tour events, including the 1989 Open Championship.
Calcavecchia was born in Laurel, Nebraska. While he was a teenager, his family moved from Nebraska to West Palm Beach, Florida in 1973. He attended North Shore High School in West Palm Beach, and won the Florida high school golf championship in 1977 while playing for the North Shore golf team. While playing in junior tournaments, Calcavecchia often competed against Jack Nicklaus' son, Jackie, and as a result began a lifelong friendship at the age of 14 with the legendary pro.
He received an athletic scholarship to attend the University of Florida in Gainesville, Florida, where he played for coach Buster Bishop and coach John Darr's Florida Gators men's golf teams in National Collegiate Athletic Association (NCAA) competition from 1978 to 1980. Calcavecchia earned first-team All-Southeastern Conference (SEC) honors in 1979.