The Prefontaine Classic, the headline track and field meet of the year, airs live on NBC and NBCSN and streams on NBC Sports Gold on Friday and Saturday.
Olympic gold medalists Allyson Felix and Justin Gatlin lead the strongest fields of the Diamond League season. A full schedule and start lists are here.
There are no world outdoor championships this year, so the Diamond League is key, and the Pre Classic in Eugene, Ore., is known for having the best fields on the circuit.
American athletes are also preparing for the USATF Outdoor Championships next month in Des Moines, Iowa.