The Raiders are a complete mess at just about every offensive position and wide receiver is one of them. Juron Criner, Jacoby Ford, Denarius Moore and Rod Streater are all legitimate threats to be the top guy. Butler is 6'3" and has the skills to get open while going up to make plays in the end zone.
Fantasy impact: If one team is "hands off" for fantasy football, it's the Raiders. They may have the worst offensive line in the league, they have a quarterback that was leapfrogged by a rookie last year and the team doesn't have an identity yet. Still, targets are targets and the player that gets the WR1 job could be on the radar. Streater figures to be the safer bet for receptions while Moore offers the greatest upside. If you're in a very, very deep league, you can add Butler to the list of lottery tickets to take at the end of your draft.