Phil Mickelson, right, Kevin Na, center, and their caddie observe a moment of silence on the 13th tee during the first round of the Charles Schwab Challenge golf tournament at the Colonial Country Club in Fort Worth, Texas, Thursday, June 11, 2020. Players at the 8:46 a.m. tee time paused to pay their respects to the memory of George Floyd for a moment of silence, prayer and reflection. (AP Photo/David J. Phillip)

Phil Mickelson observes a moment of silence on the 13th tee during the first round of the Charles Schwab Challenge golf tournament at the Colonial Country Club in Fort Worth, Texas, Thursday, June 11, 2020. Players at the 8:46 a.m. tee time paused to pay their respects to the memory of George Floyd for a moment of silence, prayer and reflection. (AP Photo/David J. Phillip)

Harold Varner III tees off on the 14th hole during the first round of the Charles Schwab Challenge golf tournament at the Colonial Country Club in Fort Worth, Texas, Thursday, June 11, 2020. (AP Photo/David J. Phillip)

Gary Woodland observes a moment of silence on the 13th tee during the first round of the Charles Schwab Challenge golf tournament at the Colonial Country Club in Fort Worth, Texas, Thursday, June 11, 2020. Players at the 8:46 a.m. tee time paused to pay their respects to the memory of George Floyd for a moment of silence, prayer and reflection. (AP Photo/David J. Phillip)