The Broncos signed Drew Lock yesterday, ensuring the young quarterback they've cast their lot with will be in the fold for training camp. Denver selected Lock in the second round, and they'll hope he works out better than the other quarterbacks they've selected in the first two rounds over the last decade: Tim Tebow (1st, 2010), Brock Osweiler (2nd, 2012) and Paxton Lynch (1st, 2016).

With Lock, you wonder a little why no NFL team (including the Broncos) was willing to spend a first-round pick on him. Rarely do they let great quarterbacks slip past that. It happens. Russell Wilson was a third-round pick, probably because of the gradually fading height bias. But that's the exception that proves the rule.

In fact, the last 20 years have produced about as many franchise quarterbacks in the sixth round of the draft (Tom Brady) as the second round. Since Drew Brees way back in 2001, there have been way more bad second-round quarterbacks than good.

SECOND-ROUND QUARTERBACKS, 2000-PRESENT
YearPkPlayerSchoolResult
201942Drew Lock, Den.Missouri?
201752DeShone Kizer, Clev.Notre DameBust
201651Christian Hackenberg, NYJPenn StateBust
201436Derek Carr, Oak.Fresno StateGood
201462Jimmy Garoppolo, N.E.Eastern IllinoisGood?
201339Geno Smith, NYJWest VirginiaBust
201257Brock Osweiler, Den.Arizona StateBust
201135Andy Dalton, Cin.Texas ChristianGood
201136Colin Kaepernick, S.F.NevadaGood
201048Jimmy Clausen, Car.Notre DameBust
200944Pat White, Mia.West VirginiaBust
200856Brian Brohm, G.B.LouisvilleBust
200857Chad Henne, Mia.MichiganBust
200736Kevin Kolb, Phil.HoustonBust
200740John Beck, Mia.Brigham YoungBust
200743Drew Stanton, Det.Michigan StateBust
200649Kellen Clemens, NYJOregonBust
200664Tarvaris Jackson, Minn.Alabama StateBust
200132Drew Brees, S.D.PurdueGreat
200153Quincy Carter, Dall.GeorgiaBust
200159Marques Tuiasosopo, Oak.WashingtonBust

Other than Brees, even the good ones in that timeframe have left you wanting a little bit more. Andy Dalton has generally been a success, but the Bengals haven't won a playoff game with him. Derek Carr has seemingly already played his best football, leaving Jon Gruden maybe wanting a little more. Colin Kaepernick took the 49ers to the Super Bowl, but his star had faded even before the controversy began. Too early to say, I think, on Jimmy Garoppolo.

Lock has some things going for him, which is why he was in the discussion to be a first-round selection. Big, athletic (he'll run some), and strong-armed. But his accuracy is shaky (57 percent completions in college, though his best year was his last, at 63 percent, so he improved). He notably struggled in games against top opponents (and now they'll all be top opponents). And he fell to the second round.

Joe Flacco will open as the starter, but he looked cooked at times in Baltimore, and there's a recent injury history. We might see Lock on the field at some point this season. Kind of a poor historical trend for second-rounders he'll be bucking, though.

--Andy Richardson