Not only is Kupp good, he was one of the best WRs in the entire NFL. I hope the knee injury doesn't make his career go sideways, because I had him at a future pro bowler and possibly more.
Just because he isn't the fastest guy, I believe the naysayers come out, but he is a master at his craft.
Holt, Bruce, Fitzgerald, Welker Guys that just know how to play the WR position in the NFL.
He reminds me of a late career Fitzgerald, minus maybe the physical strength.
