Who do the 49ers need to stand out against the Raiders?

Kyle and Chris discuss which 49ers players need to stand out in Saturday's preseason game against the Las Vegas Raiders (spoiler: a lot of them are rookies). Can Alfred Collins play well against starters while the defensive line is decimated by injuries? Can Nick Martin not miss so many tackles after struggling in Week 1? Will Ricky Pearsall show out in a game situation after playing well in training camp? Can Jake Moody give 49ers fans some confidence? They break all that down, and more, and talk about where Brock Purdy ranks in Mike Sando's tiers of NFL quarterbacks.