Well he avg. 114.5 yds a game which is pretty impressive in a 17 game span. (more games the harder to keep an avg. up)
Everyone is throwing out some popular ones
Cooper Kupp 145 rec 1947 yds 16 TDs 114.5 yds/G (17 games)
how about an old school guy from yesteryear. (1961)
Charley Hennigan 82 rec 1746 yds 12 TDs 124.7 yds/G (14 games)
2012 Calvin Johnson beats Kupp in yds & Yds/G except he only has 5 TDs & a much less catch %
122 rec 1964 yds 5 TDs 122.8 yds/G (16 games)
2015 Julio Jones 136 rec 1871 yds 8 TDs 116.9 yds/G (16 games) If he only had more TDs.
1995 Jerry Rice 122 rec 1848 yds 15 TDs 115.5 yds/G (16 games)
1965 Lance Alworth 69 rec 1602 yds 14 TDs 114.4 yds/G (14 games)
Might as well throw Crazy Legs Hirsch in there as well considering the era.
1951 66 rec 1495 yds 17 TDs 124.6 yds/G (12 games)
It could be argued, depending where you put the most worth (statwise) into. That he has had the best season season for a WR.
What I really find incredible is his 75.9 catch%