Ryan Tannehill's knee was expected to keep him out until at least next week which is why the Dolphins' decision to rule him out for Saturday's game against the Pittsburgh Steelers is not a surprise. Veteran backup Matt Moore will start in place of Tannehill, as he had in the three prior games that Tannehill missed due to the same injury. Moore will be up against it this weekend as the Steelers are favored to win the game by nearly 10 points.