CHARLOTTE, N.C. — NASCAR driver Brian Vickers has been hospitalized with an undisclosed medical condition and will not race this weekend at Dover International Speedway.

Red Bull Racing says Casey Mears will replace Vickers in the No. 83 Toyota.

The team says Vickers was hospitalized Wednesday night and is undergoing tests.

The 26-year-old is in his seventh full season racing in NASCAR's elite Sprint Cup Series. He has two career Cup wins and made the 12-driver Chase for the championship last season.

He's currently ranked 20th in the standings.