I think my player would absolutely jump at the chance to color commentate for another sport even if they don't know anything about it. I mean look at the positives, color commentators are almost like historians of the teams and leagues they work in so it would be easy to learn the lingo and who is good or bad, on a cold or hot streak, etc. Plus you would get to learn the sport from those who live and breathe it every single day as much as the players themselves do. I'd do some studying sure, probably learn about who I am watching and ask questions while on the air so that the layman and/or new fans can learn right along side me. Hell, I might even become a fan from watching myself. Its hard though to find a sport no one knows about or a lot about so for this scenario we'll just go with baseball.