What do you think about my Mock Baseball team? Where can I improve?

Unlike what Cody says, I believe that your starting pitching is your strongest point. Those are 5 very solid starting pitchers and they are all very good strikeout pitchers. Your closers are amazing as well. As far as this team goes, everything looks pretty solid. McCann is a top 3 catcher, Utley is the number 1 2B in baseball, you have two very good outfielders (Ellsbury and Beltran) and two mediocre ones (is that Juan Rivera, by the way?). I would see what I could get for 1B (Delgado has pop, but he's been getting hurt a lot in the recent years) and outfield as well. Hill is a great Util player (if that is Aaron Hill...HUUUUGE year last year). Your team is pretty solid, nonetheless. It is very well rounded.