2019 World Series: Latest Betting Lines and Predictions for Houston Astros vs. Washington Nationals

The Houston Astros arrive into the World Series as the biggest favorite since 2007.

According to various bookmakers, the Astros are a 5/11 favorite (-220 in moneyline terms) to win a second World Series title in three seasons, while the Washington Nationals are 19/10 underdogs to win the World Series for the first time in their history.

Houston's are the shortest odds for any team entering the Fall Classic since the Boston Red Sox were a 10/23 favorite ahead of their series against the Colorado Rockies in 2007—which they won 4-0.

"Lines bigger than -200 are rarely seen at the World Series because bettors usually believe it will be extremely close—not this time," said Alex Donohue, betting industry expert at Bet-PA.com.

FiveThirtyEight projections, meanwhile, give the Astros a 60 percent chance to win the World Series, to the Nationals' 40.

At the beginning of the season, the Astros were 6-1 favorite to win the World Series, joint-favorites along with the Boston Red Sox.

Houston has lived up to the hype, winning 107 games this season—most of any of other team in the MLB. The Astros then overcame the Tampa Bay Rays in the American League Division Series, before defeating the New York Yankees 4-2 in the American League Championship Series.

On Saturday, Jose Altuve hit a two-run, walk-off home run as Houston eliminated the Yankees for the third time in the playoffs in the last five seasons.

Odds on Washington to win a first ever World Series title were as long as 50-1 when the Nationals languished at 19-31 on May 23.

Washington, however, embarked on a 74-38 run since, before eliminating the Milwaukee Brewers in the Wild Card Round.

Houston Astros, Jose Altuve
Yuli Gurriel #10 of the Houston Astros is congratulated by his teammate Jose Altuve #27 after his three-run home run against the New York Yankees during the first inning in game six of the American League Championship Series at Minute Maid Park on October 19 in Houston, Texas. Elsa/Getty

The Nationals then secured a first playoff series win in franchise history as they defeated the Los Angeles Dodgers 3-2, putting a halt to the Dodgers' bid to reach three consecutive World Series.

Washington needed just four games to dispatch the St. Louis Cardinals in the National League Championship Series to reach the Fall Classic for the first time in franchise history.

No team has swept the World Series since the San Francisco Giants routed the Detroit Tigers 4-0 in 2012 and bookmakers don't expect the trend to change this year.

Odds on either team to win the series in four games stand at 6/1, while odds on the World Series to end in Game 5 or 6 stand at 3/1 and 2/1 respectively.

The title series has gone the distance in two of the last three seasons—when the Chicago Cubs beat the Cleveland Indians in 2016 and when the Astros beat the Dodgers a year later—and a Game 7 finish this year is at 11/5.

According to BetOnline, the most likely outcome will see the Astros win in six games at 7/2.

Houston to prevail in seven or five games is at 4/1 and 5/1 respectively, while Washington is 7/1 to win in seven games and 8/1 to secure the title in six games.

The 115th World Series get underway in Houston, Texas, on Tuesday night with first pitch scheduled for 8:08 p.m.