Justin Upton

The trade speculation involving Justin Upton and the Yankees officially ended on Thursday.

The Arizona Diamondbacks dealt their superstar outfielder to the Atlanta Braves in a seven-team deal that sent Upton to Atlanta for Randall Delgado, Martin Prado and other prospects.

No player has been mentioned in more trade rumors this offseason than Justin Upton—and with good reason.

Being a superstar does not ensure that a player will stay with one team for a long time. There are a number of other factors at play, and this could lead teams to deal talented players for huge returns.

Some teams will look to deal their stars that are closing in on free agency so that they can get something in return for them. Other stars may be dealt because they do not mesh with the current roster that they are on.

Blockbuster deals are also interesting because they can have a significant impact on the league. There should be at least a few of these deals in 2013.

The struggle between players and management has gone on since the beginning of the sports world. Each side wants to have leverage when the inevitable split occurs. The "no-trade clause" is one of the biggest assets a baseball player can have, and Justin Upton just used his to really affect the Arizona Diamondbacks.

Justin Upton is front and center on the trading block, and there are multiple teams interested in the two-time All-Star.

A new rumor involving the Arizona Diamondbacks trading outfielder Justin Upton seems to surface daily. MLBTradeRumors.com is updating constantly with the latest potential landing spots for the sometimes brilliant and sometimes enigmatic right handed slugger.

The New York Mets have become the latest suitor in the Justin Upton sweepstakes, but they might not have the chips to pull off a blockbuster trade. Marc Carig of Newsday tweets that the Mets are interested in Upton, but are unlikely to give up their top prospects:

After months of trade rumors it's looking more and more like Justin Upton will remain on the Arizona Diamondbacks' 25-man roster.

As of now, the bulk of the MLB offseason activity is complete. The majority of the major free agents have signed. And if a blockbuster trade was going to take place, chances are it would have happened by now.

Five weeks remain between now and some of the most optimistic words in baseball:

"Pitchers and catchers report."

Before then, there are some things that still need to sort themselves out. While most of the MLB offseason is over, these storylines still need some sort of resolution.

With the clock ticking down to the beginning of Spring Training, General Manager Jack Zduriencik and the Seattle Mariners continue to search high and low for ways to improve their roster.