The veteran Centrowitz puts on a clinic in 1500m tactics, while young Hocker relies on speed and grit to carry him to a national championship.
Championship meets are always littered with jaw-dropping performances, good and bad, and this year was no exception.
High temperatures didn't slow the field much in a variety of races in Eagle Rock, Calif.
Also competing will be Alan Webb, who is retiring from professional running to focus on triathlon
American runners had a good showing last week in Moscow!
Our picks of the best moments from the 2013 USA Track & Field Outdoor Championships.