Can this be done? Yes. I do know that it will take a lot of importing teams from other mods into one new one and how to go about doing that is something I kind of know what is required of it but I am not entirely comfortable on how to go about doing it. And you can fill up one full league with Blue Jays teams. Look: 1977, '78, '84, '88, '93, '94, '98, 2005 (original roster from the game install) '06, '07, '08, '12, '13, '14 and '15 Toronto Blue Jays rosters are included in these season mods. That's fifteen right there. You need to download the mods and take out each Blue Jay team and place them in a brand new install of the game. I am sure there are many other steps but this is a start.