Depends what other irons they have in the fire at WR. What about...
Diggs
Hardman (Can play slot or outside)
Davis
Harty
Shakir
Of the 57 regular-season games Hardman has played in over the course of his career, he's logged eight or more targets in six of them. In those games, he's averaged a stat line of six receptions for 72 yards and half a touchdown.
He's 29. I know he has a lot of miles....but his workout routine is insane. He's a freak. I don't see the usual "30 plateau" for RB's applying to him.
Extend him 2 more years. His cap hit can be manipulated and we have an all time great RB at an elite level for a few seasons