World Series odds: Halfway through season, American League powerhouses still hold the cards

Halfway through the 2018 baseball season, not a whole lot has changed. 

This year's trifecta of American League powerhouses -- the Houston Astros, New York Yankees and Boston Red Sox -- still have the best odds of winning the World Series. 

According to Vegas Insider, Houston and New York are tied with just slightly better odds than the Red Sox after roughly three months of play.

The Chicago Cubs are the National League squad with the best chances to win the Fall Classic, coming in just behind Boston.

See every team's World Series odds: 

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World Series odds halfway through the season
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World Series odds halfway through the season

Toronto Blue Jays: 500/1

Via Vegas Insider

(Photo by Leslie Plaza Johnson/Icon Sportswire via Getty Images)

Tampa Bay Rays: 500/1

Via Vegas Insider

(Photo by Abbie Parr/Getty Images)

San Diego Padres: 250/1

Via Vegas Insider

(Max Faulkner/Fort Worth Star-Telegram/TNS via Getty Images)

Oakland Athletics: 250/1

Via Vegas Insider

(Photo by Quinn Harris/Icon Sportswire via Getty Images)

Detroit Tigers: 250/1

Via Vegas Insider

(Photo by Gregory Shamus/Getty Images)

Pittsburgh Pirates: 200/1

Via Vegas Insider

(Photo by Justin Berl/Getty Images)

New York Mets: 150/1

Via Vegas Insider

(Photo by Mike Stobe/Getty Images)

Minnesota Twins: 125/1

Via Vegas Insider

(Photo by Hannah Foslien/Getty Images)

San Francisco Giants: 50/1

Via Vegas Insider

(Photo by Alex Trautwig/MLB Photos via Getty Images)

Colorado Rockies: 50/1

Via Vegas Insider

(Photo by Alex Trautwig/MLB Photos via Getty Images)

Los Angeles Angels: 40/1

Via Vegas Insider

(Photo by Adam Glanzman/Getty Images)

Philadelphia Phillies: 33/1

Via Vegas Insider

(Photo by Gavin Baker/Icon Sportswire via Getty Images)

St. Louis Cardinals: 28/1

Via Vegas Insider

(Photo by Dilip Vishwanat/Getty Images)

Atlanta Braves: 25/1

Via Vegas Insider

(Photo by Scott Cunningham/Getty Images)

Arizona Diamondbacks: 16/1

Via Vegas Insider

(Photo by Mark Brown/Getty Images)

Seattle Mariners: 14/1

Via Vegas Insider

(Photo by Greg Fiume/Getty Images)

Milwaukee Brewers: 14/1

Via Vegas Insider

(Photo by Dylan Buell/Getty Images)

Washington Nationals: 12/1

Via Vegas Insider

(Photo by Patrick McDermott/Getty Images)

Los Angeles Dodgers: 10/1

Via Vegas Insider

(Photo by Jayne Kamin-Oncea/Getty Images)

Cleveland Indians: 10/1

Via Vegas Insider

(Photo by Frank Jansky/Icon Sportswire via Getty Images)

Chicago Cubs: 8/1

Via Vegas Insider

(Photo by Sean M. Haffey/Getty Images)

Boston Red Sox: 7/1

Via Vegas Insider

(Photo by Adam Glanzman/Getty Images)

New York Yankees: 4/1

Via Vegas Insider

(Photo by Hunter Martin/Getty Images)

Houston Astros: 4/1

Via Vegas Insider

(Photo by Troy Taormina-USA TODAY Sports via Reuters)
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Six teams -- the Baltimore Orioles, Chicago White Sox, Kansas City Royals, Texas Rangers, Miami Marlins and Cincinnati Reds -- were not given odds by Vegas Insider. Each of those franchises currently has a winning percentage below .500 and are at the bottoms of their respective divisions. 

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