Prior to and including the Stanford game, the box scores show Golson with 42 rushing attempts or 7 per game. From OU on, he ran a total of 52 times or 8.7/game. Furthermore, in the three games after he sat out (OU, Pitt, and BC), he ran the ball 11, 15, and 11 times.
I do not think Kelly is afraid to turn Golson loose at all.