Rupp now has an historic six national 10K championships.
The Olympic silver medalist cemented his status as the best American 10,000m runner of all-time.
Garrett O’Toole, 18, clocked in at 4:01.89 to eclipse the New England high school record in the mile Thursday.
Rupp broke his old U.S. mark of 26:48.00 with a solo last 800m in 1:57.
High temperatures didn't slow the field much in a variety of races in Eagle Rock, Calif.
The 39-year-old kicked his way to his fourth U.S. indoor title.
Check out these great shots from a stellar night of indoor at the Reggie Lewis Center!
The 17-year-old broke her own world junior record in the 1000m.
His Oregon Project teammate, Matthew Centrowitz, has withdrawn from the race.