As you can see in the chart below, the Yankees have 31 wins of 2 or more runs, thats an incredible 91% of their total wins. Blue Jays have 25 which is 78% of their toal wins. D-backs only 17, but its 81% of their total wins.
Wins by 3 or more runs is also led by the Yankees with 23, which is 68% of their wins, followed by the Devil Rays who have 22, and Blue Jays with 21.
On the losing end, Pitt and Baltimore have 24 losses of 3 or more runs.
Overall so far this year, 30% of the games have been decided by 1 run, 17% by 2 runs, and 53% by 3 or more runs.