All of the following athletes are listed online as either being Irish, Northern Irish (totally separate thing) or Irish-American (totally another separate thing).
So on March 17, be sure to salute your next green beer to one of these guys!
Josh Helmuth is the editor of CraveOnline Sports.
Photo Credit: Getty
Irish Athletes
Ben Hogan
One of the greatest golfers of all-time. 69 career wins, two wins at The Masters.
Danica Patrick
Yup, she's supposedly half Irish. 2005 IndyCar Series Rookie of the Year. 4 top 10 wins in NASCAR. You know her mostly for her modeling and GoDaddy commercials.
Jack Dempsey
The greatest boxer of his generation, Dempsey was an Irish-Cherokee Mormon from the early 20th century.
Jimmy Connors
Along with John McEnroe, both tennis players are Irish-American.
John Daly
There are many golfers on this list. Makes sense since the game was invented in neighboring Scotland. Daly has 5 PGA Tour wins all-time, but is mostly known for his outrageous attire.
John Elway
Former Broncos quarterback. Two-time Super Bowl champion. Irish-American.
John McEnroe
Considered with Connors as one of the all-time tennis greats and another Irish-American.
John Stockton
The NBA's all-time assists leader is Irish-American.
Kelly Slater
Who knew the greatest surfer of all-time had an Irish background? Slater is an 11-time ASP world champion and is of Syrian and Irish ancestry.
Kevin McHale
I know, shocking that a McHale turns out to be Irish. This all-time Celtics great who played with Larry Bird in the 80s. Hale is listed as being from Irish and Croat origin.
Mark McGwire
Big Mac! The greatest home run hitter of all-time who was on roids NOT named Barry Bonds is of Irish heritage.
Michael Phelps
The greatest swimmer known to man has more Olympic medals than anyone else in history. He's also listed as being of English, Irish, Scottish, Welsh, and German descent.
Nolan Ryan
An Irish American Baseball Hall of Fame member, and the most vicious strikeout hurler in the history of the game.
Rory McIlroy
The Northern Ireland native is currently, arguably, the best golfer in the world. He has 16 career PGA wins and is the 2014 Masters champion.
Roy Keane
The former Manchester United star who has 57 career goals is Irish.
Sam Snead
One of the best players in the game of golf for the first half of the century, Snead is first all-time in PGA Tour wins (82) and is listed as Irish-American.
Tom Brady
You know him. Patriots star. Model married to Giselle. Possibly best quarterback ever. Brady was raised in an Irish-American Catholic family.
Whitey Ford
Hall-of-Famer who spent his entire 16-year career with the Yankees, this Cy Young Award winner and 10-time All-Star is Irish-American.