The Boston Red Sox and Baltimore Orioles opened a three-game set at Fenway Park on Monday, July 20, with both clubs carrying streaks that made the matchup feel bigger than an ordinary division game. Boston brought a 13-game winning run into the opener, while Baltimore arrived with seven straight victories of its own.
That is why Orioles Vs Red Sox was drawing attention before the first pitch. The Red Sox were favored by both major US prediction markets for the Monday night matchup, and Polymarket listed Boston at $0.59 to win, a price that implied a 59% chance and left $0.41 of upside on a winning contract that settled at $1 each. Kalshi also leaned toward Boston, and it saw much bigger volume traded on the game.
On the mound, Shane Baz got the ball for the Orioles with a 4.37 xERA, while Payton Tolle started for the Red Sox after allowing one earned run or fewer in four of his last five starts. That pitching setup fit the way this series was being framed: two A.L. East rivals meeting while both were playing some of their best baseball of the year.
The edge in the betting market did not erase the friction inside the matchup. Boston was chasing a 14th consecutive win, but Baltimore did not arrive as a soft landing spot, and seven straight wins is enough to make a road trip feel different. In a sport where a single night can reset the mood of a week, this opener had the look of a test as much as a celebration.
The game was part of a crowded Monday slate across MLB, with all 30 teams in action, but this one stood out because the streaks were real and the stakes were immediate. The only unanswered part is the one that matters most after the setup: whether the Red Sox kept the run going, or whether the Orioles used the opener to change the tone of the series before the next two games.
