DJ's Agent: "He rested it at Bay Hill, got back to working some last week, and tweaked it last week lifting a jet ski.”

Doug Ferguson tracks down Dustin Johnson's agent who was, indeed, on property but free of his phone. Though the WD was clearly planned and information should have been included when the WD was announced.

His agent, David Winkle at Hambric Sports Management, said Johnson first had back pain in January when he withdrew from the Humana Challenge, and played through minor pain the next six weeks.

“His back bothered him from time to time. He kind of played through the pain, but it was never crippling,” Winkle said in a voicemail. “He rested it at Bay Hill, got back to working some last week, and tweaked it last week lifting a jet ski.”