Between their underdog status and a desire to see a Back to the Future 2 prediction come true, the Chicago Cubs really have the hearts of the casual baseball fan after Wednesday night’s National League Wild Card playoff win.

Las Vegas casinos, sports books and gambling housings are another matter.

In Reddit’s Sports community, user MyfanwyTiffany posted a link to a Bloomberg Business article that talks about bookies sweating a possible Cubs World Series victory. At the end of the 2014 season, Chicago was listed as a long shot to win it all in 2015. Odds ranged from 50 to 1 to 40 to 1 around late October of 2014.

By January, the line had changed to 18 to 1 and got as low as 6 to 1 in some places by the beginning of the 2015 season in April. (The Cubs were never the team with the worst odds to win the 2015 World Series—that distinction belongs to the Philadelphia Phillies, which had 150-to-1 odds as late as March.)

Going into the NL Divisional Playoffs against the St. Louis Cardinals, which begins Friday, the Cubs’ odds of advancing to the World Series are 9 to 2, according to the Vegas Insider betting website. To win it all, the line is 10 to 1. (In a related note, The Sporting News picked the Cubs to win the World Series in January. Wonder if they laid down some bills on that back then.)

We get it, “Back to the Future 2” said the Cubs would win the 2015 World Series. Enough already. (Universal Pictures)

Despite such terrible initial odds, bettors still took out a lot of action on the Cubs winning their first championship since 1908, even if the bets themselves weren’t that big. That means the casinos and sports books will be on the hook to a lot of big payouts if Chicago does the impossible.

For instance, a $10 bet at October’s 50-to-1 odds would pay $510 (you get back your initial $10, too) to the winner. Hell, winning with the recent 10-to-1 odds, which would pay out $110, is a nice return on a $10 investment.

How do the Cubs’ chances of a big betting payout stack up to the paydays of other winning sports underdogs? Here’s a look at some of the highest-paying long-shot winners in sports, thanks to Casino.org:

Baseball

Matchup: New York Mets vs. Baltimore Orioles, 1969 World Series

New York Mets vs. Baltimore Orioles, 1969 World Series Who Won: Mets

Mets Odds: 100 to 1

100 to 1 Payday on a $10 Bet: $1,010

Football

Matchup: New England Patriots vs. New York Giants, 2008 XLII Super Bowl

New England Patriots vs. New York Giants, 2008 XLII Super Bowl Who Won: Giants

Giants Odds: 100 to 1

100 to 1 Payday on a $10 Bet: $1,010

Basketball

Matchup: Golden State Warriors vs. Dallas Mavericks, 2007 NBA Western Conference playoffs, first round

Golden State Warriors vs. Dallas Mavericks, 2007 NBA Western Conference playoffs, first round Who Won: Warriors in six games

Warriors in six games Odds: 9 to 1 on a Warriors win; 16 to 1 for the Warriors to win in six games

9 to 1 on a Warriors win; 16 to 1 for the Warriors to win in six games Payday on a $10 Bet: $100; $170

Hockey

Matchup: USSR vs. USA, 1980 Winter Olympics medal round, the Miracle on Ice game

USSR vs. USA, 1980 Winter Olympics medal round, the Miracle on Ice game Who Won: USA! USA! USA!

USA! USA! USA! Odds: 1,000 to 1

1,000 to 1 Payday on a $10 Bet: $10,010

Boxing

Matchup: Mike Tyson vs. Buster Douglas

Mike Tyson vs. Buster Douglas Who Won: Douglas

Douglas Odds: 42 to 1

42 to 1 Payday on a $10 Bet: $430

Soccer

Matchup: USA vs. England, 1950 World Cup

USA vs. England, 1950 World Cup Who Won: USA! USA! USA!

USA! USA! USA! Odds: 500 to 1

500 to 1 Payday on a $10 Bet: $5,010

Bookies aren’t the only who are worried about everything coming up Cubs. Reddit user standarshy12 posted an observation in the Wall Street Bets community that when Chicago makes the playoffs, the stock market becomes—excuse the pun—bearish.