He’s winning but by small margins against journeyman players. Kind of worrying.
If you want to know how it seems to me,
Although Roger's not the best that he can be.
A win's still a win at the end of the day.
Though he hasn't played the best game he can play.
Don't forget he's already reached the top!
He doesn't feel he can reach any higher so he only puts in as much effort as he feels to, then he'll stop.
He knows he won't be able to play forever,
So he doesn't put in as much endeavour.
After you reach a certain age, you're more liable to injuries, aches & pains.
Motivation also wanes.
Motivation gets so low.
You only go as far as you feel you need to go.