Despite the incredible success they enjoyed this year, the Toronto Blue Jays have serious reason to be concerned heading into the offseason.

The team's contract with general manager Alex Anthopoulos is set to expire on Oct. 31 and things between the Jays and Anthopoulos are still unsettled, Shi Davidi of Sportsnet.ca writes. If the two sides can't reach an extension, Anthopoulos leaving for another team is a "real possibility," Davidi notes.

It is believed that the Blue Jays have a strong extension offer on the table for Anthopoulos, according to Davidi. So what's holding things up?

Perhaps it is the team's hiring of Mark Shapiro as president back in August? As Davidi notes, Anthopoulos and Shapiro have had nearly two full months to get a feel for their working relationship, and the two are smart enough to find common ground moving forward. However, business is always tricky, Davidi cautions, and the two may be butting heads over who's in charge of what.

With Toronto finally making the playoffs for the first time since 1993 this season, losing Anthopoulos could be a huge blow to the team's upward momentum. Anthopoulous has served as the Blue Jays' general manager since 2009 and is responsible for many of the deals that have landed the team its current star players.

Here are a few other rumors making their way around the league:

• Philadelphia Phillies: Despite a roster with plenty of holes that need to be filled, new Phillies general manager Matt Klentak says the team won't be big spenders on the free-agent market this offseason. "I think as a rule of thumb the free-agent market is not the best place to invest your money," Klentak told reporters, including Ryan Lawrence of the Philadelphia Daily News. "That's the last place we should focus." Philadelphia is coming off a season in which it posted a 63-99 record, the worst in baseball. The Phillies are expected to prioritize upgrading their pitching this offseason and will most likely look to land a few veteran starters on bargain deals.

• John Lackey: A free agent this offseason, how much does Lackey figure to command on the open market? According to Jon Heyman of CBS Sports, some people in the industry believe the 37-year-old could land a three-year deal at $15-to-20 million per. Lackey pitched like an ace for the St. Louis Cardinals this season, posting a 13-10 record with a 2.77 ERA. Although the projected money figure is high, Lackey has been a workhorse since returning from Tommy John surgery in 2013 and will likely be among the most attractive options on the pitching market this offseason.

• Rougned Odor: The Texas Rangers and their young second baseman are expected to discuss a long-term extension following the conclusion of the World Series, Heyman also notes. Odor, 21, posted strong numbers at the plate for the Rangers after returning from an early-season demotion to the minors in June. Furthermore, the second baseman was a spark plug for Texas in the postseason, hitting .278 and scoring seven runs in the team's ALDS against Toronto. Odor will be arbitration eligible for the first time in 2018.

• Domonic Brown: Now that he's officially a free agent, where will Brown end up? The former Phillies outfielder figures to draw a good deal of interest on the open market, and the Baltimore Orioles could be one team looking to sign him. The Orioles have "limited interest" in Brown, Roch Kubatko of MASNsports.com tweets. Brown, once among the game's top prospects, has mostly disappointed in the majors, hitting .246 over six seasons and battling several significant injuries, including recurring issues with his Achilles. Still, Brown showed what he's capable of when he's right with an All-Star season in 2013 and is just 28 years old. The Orioles will likely make a strong effort to improve their outfield after their outfielders combined to hit .243 last season.

• Ben Cherington: Upon Cherington's departure as general manager of the Boston Red Sox, the New York Yankees tried to hire him for a role in their front office, Joel Sherman of the New York Post writes. Sherman spoke with Yankees GM Brian Cashman, who had high praise for Cherington. "I reached out to him," Cashman told The Post. "I have a lot of respect for him, his integrity and how he did his job." Sherman notes that Cherington could have conceivably become the team's assistant general manager, a position that opened up after Billy Eppler left to become the GM of the Los Angeles Angels. Instead, the Yankees are expected to promote Tim Naehring to the role, and Cherington will serve as an "executive in residence" for Columbia University's sports management program.

• Byung-ho Park: Park, a first baseman in the Korea Baseball Organization, will be posted by his team, the Nexen Heroes, this offseason, according to the Yonhap News Agency. A former teammate of Pittsburgh Pirates infielder Jung Ho Kang, Park has been a star in the KBO. The 29-year-old hit 53 home runs this year, his second straight season with more than 50. Due to the success Kang had in his first year with the Pirates this season, plenty of teams figure to be interested in Park. According to the Nexen Heroes, Park will be posted next Monday, and bids for his services will be accepted until 5 p.m. ET on Nov. 6.