The Dolphins gave Ryan Tannehill a fat extension in the offseason, but his supporting cast doesn't knock you over. Lamar Miller might find it difficult to top his surprisingly successful 2014 season, and Kenny Stills -- imported to replace Wallace as the team's deep threat -- has lost ground this summer to Rishard Matthews, a man who's spent half his career in Philbin's doghouse. And while we're high on Cameron, his history of concussions cannot be ignored.