Seahawks rookie receiver Emmanuel Henderson was a sixth-round pick, which means he has to compete just to make the roster. But head coach Mike Macdonald wants Henderson thinking about a lot more than just making the roster.

Macdonald said after Sunday night’s preseason game, in which Henderson caught one pass, returned to kickoffs, and was a gunner on punts, that he wants Henderson to fulfill his potential, which should mean a lot more than just making a team.

Asked whether special teams is the reason Henderson is in Seattle, Macdonald answered, “It’s one of the reasons, for sure, but why stop there?”

“That’s the stuff that really popped, and…

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