Leach grew up in Weston, Massachusetts outside Boston. He was the third child in a family of six and began playing tennis after he received a racket for his 11th birthday. He earned the No. 1 singles and doubles rankings in New England's 14-and-under division, and upon moving to the 16-18 division, he was ranked No. 11 nationally.
University of Michigan
Leach accepted a tennis scholarship to attend the University of Michigan, where he won the 1982 NCAA singles title was the first married NCAA winner in history, and was a two-time All-American. He played for Michigan's tennis team from 1979 to 1982. As a sophomore, he was Michigan's top player with a 24-4 singles record, leading to the Big Ten singles and doubles titles. As a junior, Leach won all but two individual matches and made the final 16 in the NCAA Tournament. His performance earned him All-America honors in 1981. In 1982, as an unseeded player, he was a long shot to win the NCAA singles title against future 12-year professional Brad Gilbert of Pepperdine. Leach pressured the usually consistent Gilbert into errors and thrilled the collegiate tennis world by winning the 1982 NCAA singles title in straight sets. He became only the second Wolverine to win the national title, joining Barry MacKay who won the singles title in 1957. He was also a two-time Big Ten Conference doubles champion with Matt Horwitch in 1980 and with Mark Mees in 1982. In four years at Michigan, Leach had a record of 99-19 in singles competition and 80-15 in doubles competition.
ATP Tour
Leach played on the ATP Tour from 1982 to 1987 and had a career-high ranking of World No. 29 in singles and World No. 15 in doubles. He reached the final 16 at Wimbledon in 1983, and his career highlights include victories over Stefan Edberg, Pat Cash and Mats Wilander. During his five-year pro career, Leach also won four doubles titles. Leach lived both in Ann Arbor and Ponte Vedra Beach
Doubles play with his father
For many years, Leach played doubles with his father, Dr. Robert E. Leach, orthopedic surgeon for the Boston Celtics. They were the top-ranked father-son doubles pair in New England from 1977–83 and earned eight national rankings from 1979-92. In 1990, they were the nation's No. 1 tandem and won the USTA's gold ball at the National Grass Court Championships. Leach and his father began playing together when Michael was 11, and his father was his practice partner. From 1979 to 1981, the two earned a national ranking of 3, 1 and 4 as a father/son doubles duo. After a hiatus from playing together, Leach and his father later returned to the tournament circuit and won the National Father/Son Grass Court Tournament in both 1990 and 1991. Leach and his father have each been separately inducted into the USTA New England Hall of Fame, with Michael being inducted in 2001 and his father in 2006.
Later years
After retiring from the ATP Tour, Leach worked from 1987 to 1992 at the Atlanta Health & Racquet Club in Atlanta, Georgia. Since 1992, he has been the Director of Tennis at the prestigious Ponte Vedra Inn and Club in Ponte Vedra Beach, Florida. Leach has created a summer tennis event known as "Leach at the Beach." The event provides experienced and beginning players an opportunity to improve their skills through clinics, drills, match play and video analysis. Leach's hobbies are weight-training, inline-skating, reading, and dining out. He is five feet, eleven inches tall, weighs 165 pounds, and plays left-handed.
