Lions WR Kevin Ogletree has spent the entire preseason working with the first group, but his hold on the starting slot receiver position seems a bit tenuous. Ryan Broyles has had a very strong preseason and appears to be at least pushing Ogletree at the spot. Same with Jeremy Ross, who can play both spots, and possibly even Fuller, who would be an intriguing option there.
The Lions' WR3 could be fantasy relevant this year, but it's not highly likely. The team has a number of mouths to feed in the passing game, including Calvin Johnson, Golden Tate, Eric Ebron and running backs Reggie Bush and Joique Bell.