1. Tennessee Titans

They nearly got into the playoffs last year. This is their leap year with Marcus Mariota.

2. Houston Texans

Without question their defense will be the reason why they’ll be in contention.

3. Indianapolis Colts

The health of Andrew Luck hangs over their chances of taking this division from everyone else.

4. Jacksonville Jaguars

With Tom Coughlin back in charge of the front office, it’ll take a bit longer for the Jaguars to return to contention.

Head Coach: Mike Mularkey

Key Position: Secondary

Having only 12 interceptions and giving up almost 270 passing yards per game last season isn’t going to cut it if they want to make a deep playoff run. The offense is coming together nicely, but they need to stop opponents as well.

Key Acquisitions: CB Logan Ryan (New England Patriots), DT Sylvester Williams (Denver Broncos), S Jonathan Cyprien (Jacksonville Jaguars), WR Eric Decker (New York Jets), WR Eric Weems (Atlanta Falcons)

Key Rookies: WR Corey Davis, CB Adoree’ Jackson, WR Taywan Taylor

Head Coach: Bill O’Brien

Key Position: Quarterback

They drafted who they think will be their answer at quarterback this year, but will hold off on handing everything over to Deshaun Watson right out of the gates. Tom Savage did an admirable job late last season at the helm and will be given an opportunity to run it from the start.

Key Acquisitions: S Marcus Gilchrist (New York Jets)

Key Rookies: QB Deshaun Watson, LB Zach Cunningham, RB D’Onta Foreman

Head Coach: Chuck Pagano

Key Position: Defense

They allowed almost 385 yards per game on defense. Everything that could go wrong, did go wrong for them on defense last year. Jabaal Sheard should help in the pass rush and Jonathan Hankins should be a nice anchor for the run defense. It’s a good start, but more is needed.

Key Acquisitions: DT Jonathan Hankins (New York Giants), LB Jabaal Sheard (New England Patriots), LB John Simon (Houston Texans), WR Kamar Aiken (Baltimore Ravens)

Key Rookies: S Malik Hooker, CB Quincy Wilson, LB Tarell Basham

Head Coach: Doug Marrone (Interim)

Key Position: Offense

Last year was supposed to be a time for significant improvement, but the offense was dreadful while the defense showed a lot of promise. Having a reliable rushing attack should open things up for Blake Bortles and company, but this will be his last chance to prove he is a franchise quarterback.

Key Acquisitions: CB A.J. Bouye (Houston Texans), DE Calais Campbell (Arizona Cardinals), S Barry Church (Dallas Cowboys)

Key Rookies: RB Leonard Fournette, T Cam Robinson, WR Dede Westbrook