The Titans have the 4th toughest schedule. Buffalo Bills, .539 Oakland Raiders .539 New England Patriots .535 Tennessee Titans .520 Indianapolis Colts .516 The Arizona Cardinals have the softest schedule with .461. (The .520 etc. is the opponents' 2006 Pct. of record as a whole) Rule Changes Instant replay is a permanent rule. Down by contact is now a reviewable play. Spiking of the ball - spike or throwing the ball after a down has ended is a 5 yard penalty, except after a touchdown. 15 yard penalty, rather than 5 yards, for a player to make a block below the waist against an eligible receiver while the quarterback is in the pocket.