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MLB Betting: Underdog Orioles Win vs. Astros 1 of the Biggest Upsets in 15 Years

Coming off a 23-2 win over the Baltimore Orioles on Saturday, the Houston Astros were understandably heavy favorites Sunday.

The Orioles scored three runs in the ninth inning to win 8-7, leading to some sizable payouts to bettors.

According to ESPN's David Purdum, Baltimore owned a +420 moneyline, with Houston a -460 favorite at some sportsbooks in the United States. Using a Bet Labs database that tracks betting odds since 2005, the Orioles were one of the biggest betting underdogs to pick up a victory.

Because of the gulf in the teams' respective odds, Purdum wrote the Orioles had 97 percent of the money at Caesars Sportsbook.