Mark Rolfing: Previewing the U.S. Open

In this special episode, our pal, Mark Rolfing of NBC Sports/Golf Channel, helps get you ready for the 123rd U.S. Open, next week at Los Angeles Country Club. Mark also weighs on the merger of the PGA Tour, DP World Tour and the Public Investment Fund (LIV Golf). Teaser: Mark doesn't think it's a merger!