Top all-time winners of the Indianapolis 500

The 100th anniversary of Indianapolis Motor Speedway will be marked by the 95th running of the Indianapolis 500, taking place Sunday, May 29, 2011. In 94 previous races, only three drivers have won the race four times - the most of all drivers. These three drivers are legends in open-wheel racing, and heroes to drivers around the country. Here's a look at Indy's racing royalty, as well as two current drivers who may join them - or surpass them - before their careers are over.

A.J. Foyt - "Super Tex" won four Indy 500s in the 1960s and 1970s (1961, 1964, 1967 and 1977). A winner in anything he drove, Foyt is the only driver to win the Indy 500, Daytona 500, the 24 Hours of Daytona, and the 24 Hours of Le Mans. Foyt has also won the Indy 500 as a team owner - with Kenny Brack in 1999 - and twice won the Indy Racing League title (1996 with Scott Sharp and 1998 with Brack.

Al Unser- "Big Al" also won the "Greatest Spectacle in Racing" four times, and is the only driver to have a sibling (brother Bobby) and child (son Al Jr.) who have also won the Indy 500. Unser won the race in 1970, 1971, 1978 and 1987.

Rick Mears - Mears won four Indy 500s (1979, 1984, 1988 and 1991) as well as six pole positions for the race, standing as the current record holder for the event. The three-time CART champion (1979, 1981 and 1982) is the brother of Indy 500 veteran and off-road racer Roger Mears and uncle of current NASCAR driver Casey Mears.

Helio Castroneves - currently driving for Penske Racing, Castroneves is one win away from joining that elite group of four-time winners. Castroneves has wins in 2001, 2002 and 2009, as well as four pole positions. He was the first foreign-born three-time winner of the race.

Dario Franchitti - Franchitti, the three-time IndyCar Series champion, is a two-time winner at Indy (2007 and 2010). Currently driving for Target Chip Ganassi Racing, Franchitti has also raced in NASCAR's Sprint Cup, Nationwide and Camping World Truck Series, and often competes in sports cars as well.

Note: This article was written by a Yahoo! contributor. Sign up here to start publishing your own sports content.

Paula Thompson is a member of the Yahoo! Contributor Network.
Updated Thursday, Apr 28, 2011