Born in Huntington, New York, DiMarco moved to Florida with his family at age seven. He attended Lake Brantley High School in Altamonte Springs, where he played for the Patriots golf team and began dating his future wife at the age of 17. DiMarco was raised in a sports-oriented family; both of his older brothers were athletes, and his father played college basketball for St. John's University. DiMarco's nephew Patrick DiMarco is a professional football player.
DiMarco accepted an athletic scholarship to the University of Florida in Gainesville, where he played for coach Lynn Blevins and coach Buddy Alexander's Gator golf teams from 1987 to 1990. He shot a three-round score of 209 to win the Southeastern Conference (SEC) individual title in 1989, while leading the Gators to an SEC team championship. He also was a seven-time medalist, a first-team All-SEC selection in 1989 and 1990, the SEC Player of the Year in 1990, and an All-American in 1988, 1989 and 1990. DiMarco was inducted into the University of Florida Athletic Hall of Fame as a "Gator Great" in 2002.
DiMarco turned professional in 1990, won the Canadian Tour's Order of Merit as its money leader in 1992, and finished ninth on the second-tier Nike Tour in 1993 to earn his PGA Tour card for 1994. However, he was not always able to maintain his place on the PGA Tour, and he won his first professional tournament on the Nike Tour at the 1997 Nike Ozarks Open. As he moved into his 30s, he continued to improve, capturing his first trophy on the PGA Tour at the 2000 SEI Pennsylvania Classic.
His second PGA Tour victory was the 2001 Buick Challenge, where he sank a 15-foot (4.6 m) birdie on the 18th hole to tie leader David Duval, and then won on the first hole of a sudden death playoff. He won his third PGA Tour event at the 2002 Phoenix Open, which featured an infamous moment—as DiMarco was addressing a pressure putt at TPC Scottsdale's 16th hole, one of the fans yelled "Noonan!" (a reference from the movie Caddyshack). DiMarco maintained his concentration and sank the putt, then pointed at the fan and demanded that a tournament official eject him. By 2004, he had finished in the top twenty on the PGA Tour money list for five straight seasons, and had tied for second in the PGA Championship, losing the title to Vijay Singh in a three-way playoff. In 2005, DiMarco lost a sudden-death playoff with Tiger Woods to finish second in The Masters. The final round pairing of Woods and DiMarco featured the famous "in your life" moment, when Woods' chip took an incredibly long time to drop into the hole for birdie on the par three 16th, and stretch his lead to two. The Masters result moved him into the top ten of the Official World Golf Rankings. DiMarco finished as the runner-up in a major for the third time at the 2006 Open Championship at Hoylake; Tiger Woods beating him by two strokes. DiMarco achieved his four-round score of 70-65-69-68 (272, −16) less than three weeks after the death of his mother.
Arguably, DiMarco enjoyed his most consistent success from 2002 to 2006, when he was ranked in the top ten of the world rankings for 61 weeks, going as high as number six in the world in 2005. DiMarco was also a member of the U.S. national team in the 2003 and 2005 Presidents Cup, and the Ryder Cup competitions in 2004 and 2006. DiMarco sank a 15-foot (4.6 m) putt to beat Stuart Appleby and clinch the 2005 Presidents Cup.
In 2007, he disclosed that he was suffering from a chronic shoulder injury, and underwent arthroscopic surgery on his left shoulder later that year. Notwithstanding the injury, DiMarco still finished among the top 25 in six tournaments and earned more than $950,000 in fewer than nine months in 2007.
DiMarco has not played a full PGA Tour schedule since 2012. He is a frequent contributor to Morning Drive on Golf Channel.
DiMarco has known his wife Amy (née Curtis) since the seventh grade, when both attended Rock Lake Middle School in Longwood. Later, both were students at Lake Brantley High School, and attended their high school prom together. They have three children—two daughters and a son. His son, Cristian DiMarco, is a current member of the University of South Florida golf team, after transferring from Kentucky.
DiMarco hosts his own annual charity golf tournament at his local course, Heathrow Country Club in Heathrow, Florida. The "Norma DiMarco Tee Up For Life Golf Tournament" is named in honor of his mother, who died from cancer in 2006. It raises funds for R.O.C.K (Reaching Out to Cancer Kids), and features celebrities and amateurs. As part of his personal participation in the event, DiMarco plays the 12th hole with every foursome in the tournament.1988 Monroe Invitational
PGA Tour playoff record (1–2)
^ Shortened to 54 holes due to inclement weather.2002 CVS Charity Classic (with Dudley Hart)
2005 CVS Charity Classic (with Fred Funk)
WD = withdrewMost consecutive cuts made – 9 (2000 PGA – 2002 PGA)
Longest streak of top-10s – 2 (twice)
CUT = missed the half-way cut
"T" = tied for place
1Cancelled due to 9/11
DNP = Did not play
QF, R16, R32, R64 = Round in which player lost in match play
"T" = tied
NT = No Tournament
Green background for wins. Yellow background for top-10.
ProfessionalPresidents Cup: 2003 (tie), 2005 (winners)
Ryder Cup: 2004, 2006
Wendy's 3-Tour Challenge (representing PGA Tour): 2007