Blazing Sevens, who appears to be trainer Chad Brown’s lone Kentucky Derby hope at this point, will make his 3-year-old debut in either the Risen Star Stakes at Fair Grounds on Feb. 18 or the Fountain of Youth at Gulfstream Park on March 4, Brown said Tuesday. Both races are Grade 2s with a purse of $400,000. The Fountain of Youth is run at 1 1/16 miles, a sixteenth shorter than the Risen Star.