Last Saturday the Marlins and Mets played 20 innings and the Blue Jays and Rangers played 18. I found myself wondering how often two games on the same day had each gone so many innings. I began researching and was fairly quickly able to find an answer to that question*, but (as is often the case for me) then I found myself wondering about other extra-inning game tidbits. Suddenly I was immersed in hours and hours of research. One thing I discovered while working my way through the mountain of data I wanted to go through: 2013 is on pace to have more extra-inning games than any season in MLB history.