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.
Australia claimed a 16-0 Ashes clean sweep 18 months ago that led to head coach Jon Lewis and captain Heather Knight losing their jobs.
Cheltenham Gold Cup-winning jockey has died aged 65.