Who is 49ers’ QB2? Only Kyle Shanahan knows, and he’s not saying

So now what?

There’s not a lot separating Brandon Allen and Joshua Dobbs in the battle to be the backup for 49ers starting quarterback Brock Purdy.

Both had their moments in a 24-24 tie with the Las Vegas Raiders Friday night at Allegiant Stadium, and to the untrained eye their competition looks to be dead heat heading in to Tuesday’s cutdown to 53 men.

Allen got 20 snaps and was 5-for-7 for 60 yards after taking over for Purdy, who thankfully seemed fine after making the...