Most big wideouts tend to be guys who didn't want to be TEs due to the contact, they wanted to stay outside and smoke the small DBs with their talent. But with him you have exemplary play on special teams which insinuates that he's not that type of guy. He's not averse to contact and being physical. He is at least willing to get in there and learn to do the dirty work on crackdown blocks on bigger players and helping out with edge rushers.
IMO the Rams may have hit on a rarity with him. A guy who has a lot to learn but his willingness coupled with his raw talent position him to be a guy this excellent staff of ours can turn into a weapon.