By a relatively slim margin Boston is favored over St. Louis to win the World Series and the difference between the two teams according to the Game 1 betting line is even smaller.
Las Vegas has Jon Lester and the Red Sox as -120 favorites tonight, which means you’d have to risk $120 to win $100 on Boston winning at Fenway Park. That carries a break-even win rate of 54 percent, so basically it’s a coin flip that leans toward homefield advantage.
Meanwhile, the Cardinals are +110 underdogs, so a $100 bet would win $110. None of which is shocking, of course, although with Adam Wainwright on the mound I might lean ever so slightly toward St. Louis in Game 1.