It depends on when he officially withdraws.

If a golfer withdraws before the pick deadline and we are informed of it, he will be disabled and marked as withdrawn on the pick sheet. Anyone who has already picked the golfer and does not change the pick before the pick deadline will be stuck with the withdrawn player, and will receive the worst score of the day for any rounds not played.

If the golfer withdraws after the pick deadline, he will be treated the same as a cut golfer and given the highest (worst) score of all the golfers for each round.