Top 50 MLB free agents

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This year's free-agent class is one of the strongest in years, certainly since I started ranking free agents for ESPN.com back in November 2006, with incredible depth in starting pitching and a handful of young position players who still hold out some promise of upside. With MLB revenues showing no signs of abating, look for some eye-popping deals this winter, with several players crossing the $20 million per year mark. It's the new norm, and it's what the players earn based on the revenues they produce.

With these rankings, I try to provide a rough idea of the offer I'd be comfortable making to each player if I was the general manager of a contending team (or would-be contending team) and operating at or above the median payroll level.

Estimating the actual dollar value of a player to any specific team is nearly impossible, because we don't know what the marginal revenue product of a win is for each club, and that number can change for a team from season to season, or even within a season, if it's much better or worse than expected.

My numbers are not predictions, and they often will fall short of actual market values. That is due to the "winner's curse" phenomenon, in which the winner of an auction for a good of uncertain value is the bidder whose internal estimates of that value are the highest (and thus perhaps too optimistic), and because teams with large payrolls can and often do pay more for a win in the free-agent market.

This document will be updated as the offseason wears on. When a player signs, we'll add a note in the profile as to which team he signed with and for how much. We also add a note if he received a $15.8 million qualifying offer. If a player receives one and signs elsewhere, the signing team will lose a draft pick, and having a qualifying offer "attached" can really hurt the value of non-elite free agents.

Now on to the rankings.

1-10 | 11-20 | 21-30 | 31-40 | 41-50

1. Jason Heyward, RF/CF
Age: 26 | DOB: 8/9/1989
HT: 6-5 | WT: 245

Heyward has already produced 31.1 WAR in his career (baseball-reference version), the 31st-best total for any position player through his age-25 season in major league history -- he's between Lou Gehrig and Roberto Alomar -- but I'd argue he hasn't even reached his full potential yet. Heyward's value so far as a big leaguer has been primarily on the defensive side, where he has been one of the most valuable fielders at any position in baseball for the past several years, starring in right field with the occasional stint in center.

I wrote last offseason when he was traded to St. Louis that getting out of Atlanta, where numerous position players stagnated or regressed during the Frank Wren era, was the best thing for him, and it played out that way, as the Cardinals tweaked his swing enough to get him to improve the quality of his contact so that he could post the best batting average and second-best OBP of his career. It's hard to pinpoint the start of his "new" swing, but after a dismal April, he hit .306/.375/.455 the rest of the way, and hit .318/.397/.469 after the All-Star break.

That said, the changes worked out in a way I didn't expect: Instead of getting Heyward to hit for more power, the changes made Heyward even more of a ground ball hitter, raising his BABIP but not his home run production.

This version of Heyward is comfortably a 5-6 WAR per year player, and he should hold that value for the length of whatever contract he gets, even if it runs seven years. But there's no physical reason he can't find 20-25 homer power again; he hit 27 in 2012 and 18 (in 142 games) in 2010. Shoulder problems caused him to shorten his swing -- specifically the path from his loaded position to the ball -- and more mechanical work might turn him into a 7 or 8 WAR player, especially with his peak offensive years ahead of him based on his age.

If a team can find a way to pay Heyward for what he's been rather than what he might be, it could actually come out ahead on the deal, a rarity at the top end of the free-agent market. I'd be fine giving him seven years and more than $150 million.