With free agency officially getting underway in mere hours, here are our the top 83 unrestricted free agents slated to hit the open market at 4:00 p.m. ET Tuesday. Stay tuned, because we’ll be tracking all 32 teams and all 83 of these players, plus a few others. And in the early stages, we’ll update this thing as often as possible.

Quarterbacks
1. Peyton Manning: The biggest name on the market is slated to visit the Dolphins and Titans next.
2. Matt Flynn: He’ll likely be a nice consolation prize in the Manning sweepstakes.
3. Alex Smith: Likely to sign a long-term deal with San Francisco before he hits the market.
4. Jason Campbell: Could be good enough to earn one more starting opportunity.
5. Kyle Orton: Likely to get a backup role somewhere.
6. David Garrard: If he’s healthy, the 34-year-old will get a backup job.
7. Chad Henne: Likely to leave Miami considering what’s going on.
8. Vince Young: Doesn’t look like he’ll return to the Dream Team.
9. Rex Grossman: He’s probably only on this list because of his name…

Running backs
1. Michael Bush: Almost 1,000 yards despite starting only nine games last year.
2. Mike Tolbert: Who can’t use a 26-year-old battering ram?
3. BenJarvus Green-Ellis: The 26-year-old has 24 touchdowns in two seasons.
4. Kevin Smith: Showed some serious glimpses last year.
5. Peyton Hillis: Someone will sign him in hopes that he returns to his 2010 form.
6. Cedric Benson: He’ll be 30 this season; could take a while to find a job.

Receivers 
1. Marques Colston: Stayed in New Orleans, signing a five-year contract worth $40 million.
2. Vincent Jackson: Same deal here, but there’s a chance he re-signs.
3. Brandon Lloyd: Rumors have him joining Josh McDaniels in New England.
4. Reggie Wayne: The Colts are probably moving on; will he join Manning somewhere?
5. Mario Manningham: Rumors have him hitting Tampa if the Giants can’t re-sign.
6. Pierre Garcon: Signed five-year deal worth $42.5 million with Washington.
7. Laurent Robinson: Made a lot of money with a sleeper 2011 campaign in Dallas.
8. Robert Meachem: Has the tools but hasn’t delivered the last four years.
9. Eddie Royal: He might be an underrated target on the market.
10. Randy Moss: Signed with 49ers (1 year).
11. Braylon Edwards: His next team might be his last.
12. Early Doucet: Coming off a breakout season as he enters his prime.
13. Harry Douglas: Why is no one talking about him?
14. Deion Branch: Reliable but not flashy, and he’ll be 33 this summer.

Tight ends
1. Martellus Bennett: Former second-round pick who is athletic enough to shine, but hasn’t yet.
2. John Carlson: Missed the entire 2011 season but he’ll only be 28.
3. Jeremy Shockey: You know what you’re getting. He’ll be 32 and gets hurt a lot.
4. Joel Dreessen: Stellar spot starter; he’ll make solid money somewhere. Probably not Houston.
5. Visanthe Shiancoe: Can’t believe he’s turning 32. Might only get a short-term deal.

Offensive tackles
1. Jared Gaither: Came out of nowhere to play superbly in relief of Marcus McNeill last year.
2. Demetrius Bell: If he can stay healthy, he can become a premier left tackle. It’s in him.
3. Anthony Collins: Lost in the mix as part of one of the best lines in football in Cincinnati.
4. Jeff Backus: Aging but reliable.
5. Kareem McKenzie: Aging and increasingly less reliable. Not a starter anymore.

Guards
1. Carl Nicks: Outside of Manning, he’s the most talented offensive player on this list.
2. Evan Mathis: Coming off an even better season than Nicks had. Great year for UFA guards.
3. Ben Grubbs: Versatile 28-year-old will be a hot commodity.
4. Jake Scott: Again, nothing special but a great pass blocker and you know what you’re getting.
5. Chilo Rachal: The 25-year-old former second-round pick is a monster.

Centers
1. Chris Myers: Houston might not be able to afford one of the best centers in all of football.
2. Scott Wells: Something tells me the Packers will find a way to keep him before the market opens.
3. Samson Satele: An underrated center who the Raiders should re-sign if they have the money.
4. Nick Hardwick: Re-signed with San Diego for three years.
5. Jason Brown: Highly touted free agent from ’09 is already back on the market.

Defensive ends
1. Mario Williams: The Texans couldn’t afford to tag him, and as a premier rusher he’ll demand a ton.
2. Cliff Avril: The Lions want to keep him badly, but he isn’t budging.
3. Jeremy Mincey: Quietly had eight sacks in 2011 and 13 the last two years.
4. John Abraham: About to turn 34, but can still bring it as a situational rusher.
5. Israel Idonije: The 31-year-old is coming off a disappointing season.
6. Andre Carter: Made some money with a stellar 2011 campaign in New England.
7. Mark Anderson: See: Andre Carter.

Defensive tackles
1. Red Bryant: Re-signed with the Seahawks. Five-year deal worth $35 million.
2. Paul Soliai: Outpricing the Dolphins after playing under the tag last season.
3. Brodrick Bunkley: The 28-year-old former first-round pick had a stellar 2011 season in Denver.
4. Antonio Garay: Perennially underrated but turns 33 this season.
5. Jason Jones: Nothing special but he can be a consistent three-technique force.

Outside linebackers
1. Erin Henderson: At only 26, I can’t figure out why the Vikes haven’t signed him long term.
2. Manny Lawson: Starting-caliber player in 3-4 and 4-3.
3. Jarret Johnson: Consistent, always healthy and still in his prime. But how would he fare outside of Baltimore?
4. Leroy Hill: Character questions and he’ll be 30, so might only get a short, incentive-laden deal.

Inside linebackers
1. Stephen Tulloch: Another guy the Lions are having trouble with after signing a one-year deal in 2011.
2. David Hawthorne: The 26-year-old is a force against the run.
3. Curtis Lofton: There’s a chance he returns to Atlanta in 2012.
4. Dan Connor: The Eagles have been a hot rumor here.
5. London Fletcher: Looks like Washington wants him back, but he’ll be 37 this offseason.

Cornerbacks
1. Cortland Finnegan: He’s as good as gone in Tennessee. Dallas?
2. Brandon Carr: With Stanford Routt joining the Chiefs, he’ll likely find a new home. Dallas?
3. Carlos Rogers: Made a lot of money playing on a one-year deal in San Francisco. Dallas?
4. Tracy Porter: Might also find a new home as the Saints fight for cap space. Dallas?
5. Terrell Thomas: Stayed with the Giants on a four-year deal worth $28.4 million.
6. Tim Jennings: Re-signed with Chicago for two years.
7. Richard Marshall: He’s a stable, starting-caliber corner in his prime.
8. Aaron Ross: He’s far from special, but brings depth and a veteran presence.

Safeties
1. Reggie Nelson: He’ll hit free agency but is still talking to the Bengals.
2. LaRon Landry: The 27-year-old shines when he’s healthy. The problem: he’s rarely been healthy lately.
3. Dwight Lowery: Coming off a solid year in Jacksonville.
4. Jim Leonhard: A veteran leader with a bad injury history.
5. O.J. Atogwe: The Canadian just got cut. The safety market is weak this year.