The whole Offense sucked, what can you point to that was specific to the WRs?

Please ensure you do the due dilligence to understand what the route should have been, if it was run properly, if the QB understood what route should have been run, if the QB threw the ball to the right spot, was the play an ad hoc/helter skelter play not designed, etc.

With how lost the team looked trying to learn a pro-style/West Coast system, it would be nearly impossible to figure out where the WRs failed. Wide open drops, like Hifo in the Utah game, could be an example but how is the coach responsible for that?

Cahoon doesn't design plays, call plays, or throw the ball. He teaches technique, motivates, and recruits. He innovates on the practice field and develops the talent (using data and analytics during Spring and Summer practices, making the WR catch thousands of balls during the offseason, etc.).

The #1 reason the WRs sucked is the same reason the O sucked this year...bad OC, bad scheme, and QB injuries.