Before all the confetti and empties were picked up from the streets of Kansas City after the Royals had their World Series parade, the Major League Baseball hot-stove season had its first blockbuster trade. 

When the Los Angeles Angels decided to give up a significant return package to acquire all-world shortstop Andrelton Simmons from the Atlanta Braves, it was the kind of deal that could result in both clubs receiving game-changing players.

While the majority of the baseball world is focused on the stars of today and where they will be playing next season, the stars of tomorrow are honing their crafts in various offseason leagues. 

Over the next few slides, we'll rank the most eye-opening individual performances taking place in the Arizona Fall League. 

The Tampa Bay Rays have reportedly been selected as one of the participants to play in a potential spring training game in Cuba after winning a drawing by MLB commissioner Rob Manfred, according to the Tampa Bay Times' Marc Topkin. 

MLB still needs to receive clearance to hold the game in Cuba, but if all the procedural boxes are checked off, Tampa Bay will be in line to make the trip. 

Ian Desmond rejected his $15.8 million qualifying offer from the Washington Nationals, per MLB.com's William Ladson, and suitors are already starting to emerge for the free-agent shortstop.

Continue for updates.

The Boston Red Sox made an offseason splash Friday, acquiring four-time All-Star closer Craig Kimbrel from the San Diego Padres, per Ken Rosenthal of Fox Sports.

Rosenthal confirmed that outfielder Manuel Margot was part of the deal. The 21-year-old has hit .282 with 23 home runs and 175 RBI in 344 career minor league games.

Sifting through the 2015-2016 MLB free-agent market, there's just no one quite like Bartolo Colon.

Simply put, the right-hander is an ageless wonder.

Even with his 43rd birthday looming in May, Colon is still a viable free-agent option for a club that is aiming to round out its rotation. And, Colon isn't the only big league vet who proved in 2015 that his tank isn't empty just yet.

Warning: Video contains graphic content.

David Ortiz isn't just crushing balls over the Green Monster anymore. He's crushing the monsters (along with other mutated people and creatures) themselves!

The Major League Baseball season is over, but hot-stove action is just heating up.

It's a time when bad teams look to get better, but even the World Series champion Kansas City Royals don't shut it down in the offseason.

While they are looking to make an already strong team stronger, they also are fending off teams that are seeking to add the services of free agents who played in Kansas City last year, such as Alex Gordon and Ben Zobrist.

The Los Angeles Dodgers are in the market for starting pitching, and word is they're willing to go big. They either want to re-sign Zack Greinke or, failing that, sign David Price instead.

The 2015-16 MLB offseason is just starting to pick up steam here midway through the month of November, though there have been some significant moves already made.

Free agents A.J. Pierzynski and Franklin Gutierrez both opted to re-sign, the Yankees and Twins pulled off a swap of Aaron Hicks-for-John Ryan Murphy and the Mariners acquired Joaquin Benoit from the Padres for a pair of prospects.