The craziest thing I saw in this mock is that he has the 49ers picking 21st. I'd be ecstatic if they had the 11th best record in football this year.
That would be the 12th best record, if that was how the NFL worked. It isn't. All it means is that they made the playoffs (division champs, possibly at 6-10), were eliminated in the first round (a home game) and had the worst record of the first round losers. The final 12 picks go to the playoff teams.