Video: Five things you need to know about the 2015 U.S. Open

The 115th U.S. Open tees off Thursday at Chambers Bay in University Place, Wash.

There will be 148 players in the field, including defending champion Martin Kaymer of Germany, world No. 1 Rory McIlroy of Northern Ireland, and Americans Tiger Woods, Phil Mickelson and Jordan Spieth. Also in the field is Folsom native Kevin Lucas.