Why are the Orioles Overperforming their BaseRuns? October 13, 2016 Ryan Pollack Baseball Analysis Yesterday at FanGraphs I dug more deeply into why the Orioles are overperforming their BaseRuns win percentage. They’ve done this seven years in a row. By analyzing all 450 team-seasons since 2002, I was able to find a few common factors. Want more analysis? Get emailed when I post new content.