Although Butler caught our eye with an impressive preseason performance as a seventh-round rookie back in 2013, he has been unable to climb an underwhelming depth chart in Oakland.
The former San Diego State star has caught 30 passes for 383 yards and two touchdowns over the past two seasons.
For all that promise, why has Butler been buried by two different coaching staffs in Oakland?
Bay Area News Group's Jerry McDonald suggested during the offseason that he has simply made too many mental errors.
If that's the knock on Butler, it's fair to wonder if he will be up to speed on Scott Linehan's playbook in time to make a dramatic impact before Bryant returns to game action.