As the 30 Major League Baseball teams prepare to head to Florida and Arizona this week for spring training, it brings to a close one of the sleepiest offseasons in recent years - one that saw just one nine-figure free agent signing (Yoenis Cespedes to the Mets), one blockbuster trade (Chris Sale going from the White Sox to the Red Sox) and many traditionally big spenders (Yankees, Dodgers, Cubs, Mets) largely standing pat or getting leaner.

But in a strange twist, even as the 2017 season approaches, the entire industry is transfixed on the epochal free agent class that is still two winters away - a massive wave of talent that is acting as a black hole governing the sport's transactional physics, its sheer gravitational pull affecting just about every team's decisions some 21 months beforehand. And its presence out in the distance helps explain the relative inaction this winter.

Assuming the players don't re-sign with their current teams, that 2018-19 free agent "superclass" will include Washington Nationals outfielder Bryce Harper, for whom numbers such as $400 million already have been floating around the industry, and Baltimore Orioles third baseman Manny Machado, whom many consider to be just as valuable, if not more so.

It also would include hitters Josh Donaldson and Andrew McCutchen, starting pitchers Matt Harvey and Dallas Keuchel, and relievers Zach Britton and Andrew Miller. And should they exercise opt-out clauses, ace lefties Clayton Kershaw and David Price also could hit the market that winter.

It is considered the best free agent class since at least 2000-01, when Alex Rodriguez, Manny Ramirez, Mike Mussina and Mike Hampton all hit the market at the same time - and all of whom, to one degree or another and for better or worse, altered the trajectories of the teams that signed them.

"Every team has three- and five-year outlooks that involve upcoming free agent classes," Chicago Cubs General Manager Jed Hoyer said. "But it's been a while since a class like that one has come along."

The calculations regarding that free agent class affect not only the teams, such as Washington and Baltimore, that stand to lose their franchise cornerstones - and whose championship windows may be closing accordingly - but all the other teams contemplating bidding on one or more of those players and whose payroll decisions for 2017 may be influenced at least in part by what 2019 could hold.

Photos of five-time All-Star Chris Sale.

When the Chicago White Sox traded away their ace, Sale, and their leadoff man, Adam Eaton, to Boston and Washington, respectively, during the winter meetings - receiving seven prospects in return and shedding more than $30 million in guaranteed future salaries - they acknowledged their designs on that 2018-19 free agent class.

"Two years from now there could be a lot of high-impact talent potentially available," White Sox GM Rick Hahn said. "To plan with specific targets in mind right now is probably a little foolhardy, but we've all noticed the potential depth of that class, and we're going to be ready."

Going to be ready? They're already ready. The White Sox have just $4.25 million committed to 2019 payroll, all of it in the form of buyouts of team options to a trio of veterans.

The White Sox aren't alone in shedding future payroll commitments - and in clearing room for a spending spree after the 2018 season.

The Phillies have just $5.35 million committed to 2019 payroll, and the Cubs have just $72 million. Neither signed a free agent to a multiyear deal this winter. The Mets have $53 million committed in 2019 and essentially sat out this winter's free agent market after re-signing Cespedes. The Dodgers, meanwhile, after doing little more than re-signing their own free agents this winter, have $107.5 million committed to 2019 - but if Kershaw opts out that number drops to $72.9 million. (All payroll figures are from baseball-reference.com.)

Clayton Kershaw Jeff Gross / Getty Images

Pitcher Clayton Kershaw could be one of the biggest names in the 2018 class of free agents. 

Pitcher Clayton Kershaw could be one of the biggest names in the 2018 class of free agents. 

(Jeff Gross / Getty Images)

While some of the industry's newfound austerity can be explained by the new, more onerous luxury-tax penalties in the latest collective bargaining agreement - with taxes of up to 95 percent for repeat, excessive spenders - it's no coincidence that baseball's big-money teams are reducing future payroll commitments just in time for the superclass of free agents to arrive in 21 months.

Look no further than the New York Yankees. Even though they likely will field another $200 million-plus team in 2017, they have shown a remarkable commitment to youth and development in recent years and have just $74.2 millionon the books in 2019 payroll, by which time they will be out from under the contracts of Rodriguez, CC Sabathia and Chase Headley, among others.

While the Yankees say their strategy is about developing young players and not about clearing space for massive spending on free agents - "We'd rather produce those types of players ourselves than have to go out and bring them in through free agency," GM Brian Cashman said - their stated goal of getting under the $197 million luxury-tax threshold by 2018 has one significant benefit: It would reset their tax rate from the 50 percent they paid in 2016 to as low as 20 percent.

And that would happen just in time for the superclass of 2018-19 to arrive. It's little wonder that it is considered more or less a given within the industry that the Yankees will sign either Harper or Machado that winter - should one or both be available, of course.

It's rare, if not unprecedented, for a future free agent class to hold such sway over baseball's economy so far in advance, but never before have two players like Harper and Machado arrived at free agency at the same time. While that free agent class is deep in talent - and could get even deeper should Kershaw and/or Price opt out of their deals - Harper and Machado are different animals.

Both will be just 26 years old at the end of the 2018 season - compared to 30 for Kershaw, 33 for Price and 32 for Donaldson, to name three others - recalling Rodriguez's first foray in free agency in 2000-01 at age 25, when the Texas Rangers signed him for 10 years and $252 million. MLB's total revenues were less than $5 billion then but could be $12 billion or more by 2019.

"Those players who are 26-, 27-, 28-year-old free agents are very, very highly coveted," agent Scott Boras, whose clients include Harper, said earlier this offseason. "A lot of clubs have now marshaled their positioning to that age group."

There is a baseball season approaching mere months away, and in places such as Boston, Los Angeles and the north side of Chicago, there is an appropriate level of excitement for what 2017 could bring, with little need or inclination to worry about what lies beyond.

But for the folks who run those teams - and all the other teams - there is always one eye trained on the future, and simply because of what is coming 21 months from now, that has never been more true.

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