Driver Tony Stewart waits in the garage while his car is worked on during practice for the Sunday's NASCAR Sprint Cup series auto race at New Hampshire Motor Speedway in Loudon, N.H., Friday, Sept. 25, 2015 (AP Photo/Cheryl Senter)
Driver Tony Stewart waits in the garage while his car is worked on during practice for the Sunday's NASCAR Sprint Cup series auto race at New Hampshire Motor Speedway in Loudon, N.H., Friday, Sept. 25, 2015 (AP Photo/Cheryl Senter) Cheryl Senter AP
Driver Tony Stewart waits in the garage while his car is worked on during practice for the Sunday's NASCAR Sprint Cup series auto race at New Hampshire Motor Speedway in Loudon, N.H., Friday, Sept. 25, 2015 (AP Photo/Cheryl Senter) Cheryl Senter AP

AP source: Tony Stewart to retire after 2016 season

September 27, 2015 11:16 PM

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