The nation’s top runners, jumpers and throwers will take the stage this week in Sacramento, aiming to earn places on the U.S. team for the world track and field championships Aug. 5-13 in London.
The top three in each event qualify for worlds as long as they have met the qualifying standard. Defending world and Diamond League champions receive an automatic bye, although they are required by USA Track & Field to compete in at least one round at nationals.
Ten things to watch Thursday through Sunday at the U.S. championships.
800-1,500 double
Clayton Murphy, the 22-year-old Olympic bronze medalist in the 800 meters — and 2016 NCAA champion outdoors at 1,500 — will attempt to be the first man in 84 years to accomplish the 800-1,500 double (Glenn Cunningham did it in 1933) at the U.