Patrick Cantlay beat the field at the Memorial Tournament by 4.8 strokes per round.
Due to the fact that this field was better than your typical PGA Tour field,
this translates to a
of 5.3 per round. Given
no other information, we would expect Cantlay’s performance to
result in a win 97% of the time. That is, Cantlay accumulated 0.97
from this performance. Adam Scott, who finished 2 strokes
back of Cantlay, would have been expected to win about 85% of the time
given his strokes-gained performance. For some historical context around
just how good Cantlay’s (and Scott’s) performances were, here are the
winning true strokes-gained numbers from every PGA Tour event since 2004 (with
Cantlay's performance marked in red).