During his rookie campaign, he caught 67 passes for 872 yards and eight touchdowns. He played in all 16 games.
And while Matthews' theory is interesting -- and probably correct with a run-first team like the Seahawks for example -- the question won't be who the No. 1 wide receiver is, but who will replace Maclin's production.
Kelly has yet to really address the impending loss of 85 catches, 1,318 yards and 10 touchdowns. Perhaps that will come in the draft. Maybe it won't.
One of the true marks of Kelly's scheme success, though, would be to have another one of his wide receivers put up Maclin's numbers without adding significantly to the payroll or devoting a high draft pick.
If the system can truly produce like that regardless of talent, then the rest of the league will start to get very nervous.