The vast majority at least get on an a statistic sheet within 2 years.
Here is Jake Bequette's 2 year NFL regular season career:
Tackles: 0
Sacks: 0
Interceptions: 0
So, why does everyone automaticaly use Tavon Wilson and his 5 INT's (one a pick-6 for a TD against the Ravens this year) in 2 years as the whipping boy? I'm not saying he was good value or even good, but at least he is an NFL football player.
Seriously, Bequette was a rare terrible pick that, even as it was made, I thought "wow, that has 'terrible pick' written all over it. There must be something here that I don't see."
No, as it turns out, he just really sucks. For the life of me, I can't understand what Belichick ever saw in him to think that he was worth a third round pick. There's just nothing there to lead you to believe that the guy could play in the NFL.
At least with Tavon, the issue was that nobody had really bothered to check him out, so it was entirely possible that he was good but underexposed. As it turns out, he has plenty of athleticism, and could totally be an effective player if he didn't keep making dumb, rookie mistakes.
I can understand failing to account for a player being mentally unable to handle the job. It's hard to scout a guy's brain. I cannot understand spending a third round pick on a guy who so clearly has physical limitations that will prevent him from ever being anything in the NFL.
So yeah, most third round picks fail, but there are degrees of failure. I'd rather rather see the Patriots draft guys like Shawn Crable in the third. At least they're athletic enough that, when you eventually find one with a functioning brain and a strong work ethic, you'll have a real football player. Bequette could be the savviest player in the world; it doesn't matter if you lack the athleticism to go up against NFL tackles. We've already seen Bequette's ceiling as a player, IMO, and it's a guy who can look dominant against 3rd/4th string tackles in preseason games, where his motor can take over because for once he isn't at a huge athletic disadvantage.