As part of the deal, the athletic shoe and clothing retailer also extended its associate sponsorship of the OneAmerica 500 Festival Mini-Marathon, held the same day as the 5K.
The 500 Festival is a not-for-profit founded in 1957 to organize events celebrating the Indianapolis 500.
The group did not disclose the length of the new contract.
The 2010 races will be run on May 8. The 5K has grown from 2,400 participants in 2000 to a cap of 4,000 this year. The registration fee is $25 through Nov. 30, and $30 from Dec. 1 until the maximum field of 4,000 is reached.