Weirfan Is it the E6 to reduce side spin ?
I know how it feels to play with injury. One time I had several herniated disc in my lower back, couldn't even get out of bed, had to roll off the side of the bed..... not able to swing golf clubs properly for sure.
The psychological impact after a major injury ( surgery ) will also play tricks on one's mind and that is all there is for scoring low in the top level play.
Maybe this will be his last professional season, but certainly hope it is not. He still has a lot to offer if his body and mind did not abandon him.