Dustin Johnson suffered injury from bedroom incident with wife Paulina Gretzky heading into US PGA
![Dustin Johnson suffered injury from bedroom incident with wife Paulina Gretzky heading into US PGA](https://i2-prod.mirror.co.uk/incoming/article32821446.ece/ALTERNATES/s615/0_GettyImages-1491010920.jpg)
Two-time PGA Championship runner-up Dustin Johnson revealed the back injury during a press conference previewing the tournament and then explained how he did the damage