These write-ups appear in ESPN The Magazine's August 31 NFL Preview Issue. Subscribe today!
This time of year, you'll hear a lot about continuity. The Packers and Seahawks have it; the 49ers and Titans don't. And while continuity is important -- what's not to like about the Packers' offense or Seahawks' defense? -- using the draft and free agency to fill roster holes is vital to building a Super Bowl contender.
On that note, let's run down the biggest offseason addition for each team in 2015.
AFC EAST
Buffalo Bills | RB LeSean McCoy: Since 2010, the former Eagle has averaged 1,626 yards from scrimmage and 10 TDs per season. In coach Rex Ryan's ground-and-pound attack, that'll play just fine.
Miami Dolphins | WR Kenny Stills: Last season in New Orleans, Stills caught 63 passes, 15 more than expected from an average wide receiver running similar routes, trailing only Antonio Brown and Emmanuel Sanders in added catches.
New England Patriots | TE Scott Chandler: The Patriots used a two-tight-end set on a league-high 58 percent of their plays in 2014. Rob Gronkowski's 67.1 percent catch rate ranks sixth among active TEs (minimum 100 receptions), but Chandler is not far behind, ranking ninth at 66.4 percent.