San Francisco 49ers quarterback Brock Purdy's first preseason snaps in a game will likely have to wait until at least the Niners' second preseason contest set for Aug. 20 against the Denver Broncos. If they happen at all.

That's because the plan, for right now, is for Purdy to handle his usual duties as the starting quarterback in joint practices Thursday and Friday with the Las Vegas Raiders but not in the preseason opener Sunday at Allegiant Stadium.