The 41-year-old lacks the drive to compete in the sponsors’ race and is keen to not step on it before the Silverstone showpiece starts.
Clark called last year’s incident at Oakmont the “lowest point” of his career.
Pollock is the England player Springbok fans love to hate.
A majestic 75 off 47 balls rescued England from 23 for three in front of a bumper 21,128 crowd at the Oval.
Cheltenham Gold Cup-winning jockey has died aged 65.