Graham had more receptions and yards, but had 1 fewer TD, and his reception % on targets was low. He's a drive killer, and I just don't see where he has a spot on this team. There were one or two games where other teams basically stopped covering him 'cause they knew he wouldn't make the catch. That doesn't show in stats, but it has a huge impact on the game.
When Goodwin was out there last year, he was drawing coverage. Teams respect his speed and he showed he could not only get behind the DB, but make the catch.