It was surprising when the Chargers selected Mike Williams at No. 7 overall. Wide receiver seemed to be a position they were in good shape at, with Keenan Allen returning from injury and Tyrell Williams posting a breakout season. And now it looks even less likely that the rookie will be able to steal any production away from the returning wideouts.

Williams is recovering from a back injury, and on Wednesday came a report saying he might need surgery, which would cost him the entire season. That report may have been premature, but he's going to start training camp on the PUP list and is certainly no lock to play in the preseason. It's hard enough for rookie wide receivers to make an impact without having a back injury slowing their development. I wouldn't use a last-round pick on Williams at this point.

But Mike Williams' absence should be Tyrell Williams' gain. Considering Allen's injury history, Tyrell looks like the safer pick -- available later in most if not every draft, but perhaps just as likely to lead the team in receiving.

Williams is just a former undrafted free agent, but he looks to be undervalued. A year ago he led the team in both receptions (69) and yards (1,059) and was only one off the team lead in touchdowns (7). He was also more of a big-play receiver than you might expect. Among wideouts with at least 50 receptions, Williams ranked 7th in yards per catch a year ago (15.3). Most of the guys ahead of him are well-known for their big-play ability: DeSean Jackson, T.Y. Hilton, Julio Jones.

Only Jones and Hilton of that group had more receptions and yards than Williams, and only Dez Bryant had more touchdowns. Only five receivers had more 20-yard receptions than Williams, as well (and an impressive grouping: Jones, Hilton, Antonio Brown, Amari Cooper and Odell Beckham Jr.).

WIDE RECEIVERS YPC (50+ RECEPTIONS), 2016
PlayerRecYdsAvgTD20+
DeSean Jackson, Wash.56100517.9419
Julio Jones, Atl.83140917.0627
Marvin Jones, Det.5593016.9416
T.Y. Hilton, Ind.91144815.9628
Dez Bryant, Dall.5079615.9810
Alshon Jeffery, Chi.5282115.8212
Tyrell Williams, S.D.69105915.3719
Brandin Cooks, N.O.78117315.0815
Kelvin Benjamin, Car.6394114.9710
Quincy Enunwa, NYJ5885714.8414
Kenny Britt, L.A.68100214.7515
A.J. Green, Cin.6696414.6415
Rishard Matthews, Tenn. 6594514.5916
Mike Wallace, Balt.72101714.1410
Adam Thielen, Minn.6996714.0516
Dontrelle Inman, S.D.5881014.0410
Amari Cooper, Oak.83115313.9521
Ted Ginn, Car.5475213.949
Mike Evans, T.B.96132113.81215
Odell Beckham, NYG101136713.51020
Cameron Meredith, Chi.6688813.5413
Brandon LaFell, Cin.6486213.5611
Marqise Lee, Jac.6385113.5313
Brandon Marshall, NYJ5978813.4310
Davante Adams, G.B.7599713.31217
DeVante Parker, Mia.5674413.349
Pierre Garcon, Wash.79104113.2315
Emmanuel Sanders, Den.79103213.1512
Terrelle Pryor, Clev.77100713.1411
Jordy Nelson, G.B.97125713.01419
Jamison Crowder, Wash.6784712.6711
Michael Thomas, N.O.92113712.4918
Willie Snead, N.O.7289512.4412
DeAndre Hopkins, Hou.7895412.2410
Antonio Brown, Pitt.106128412.11222
Jarvis Landry, Mia.94113612.1416
Allen Robinson, Jac.7388312.1611
Doug Baldwin, Sea.94112812.0716
Demaryius Thomas, Den.90108312.0510
Robert Woods, Buff.5161312.0110
Golden Tate, Det.91107711.8413
Steve Smith, Balt.7079911.4512
Julian Edelman, N.E.98110611.3311
Michael Crabtree, Oak.89100311.3810
Adam Humphries, T.B.5562211.327
Tyler Boyd, Cin.5460311.219
Cole Beasley, Dall.7583311.156
Mohamed Sanu, Atl.5965311.146
Jordan Matthews, Phil.7380411.0313
Stefon Diggs, Minn.8490310.8310
Sterling Shepard, NYG6568310.586
Jeremy Kerley, S.F.6466710.438
Randall Cobb, G.B.6061010.247
Tyreek Hill, K.C.615939.768
Larry Fitzgerald, Ariz.10710239.668
Tavon Austin, L.A.585098.836
Anquan Boldin, Det.675848.785
Cordarrelle Patterson, Minn.524538.724

--Andy Richardson