I like your team a lot, but as kentx said - we need more info.
If its a standard 5x5 type league, then Id say your biggest weaknesses are at SS, closers, and SP depth.
Crosby is a decent late rd SS play, but you really do need to put a good backup with him because that BA is a killer and if he doesnt raise it you dont want him in your starting lineup.
Next Id go out and grab a closer and a SP - possibly 2 more closers.
Finally I would take the best MR pitcher I can find - personally I like Otsuka in SD. He's cheap and will help you in %s, Ks, and land you a handful of Ws too - all for dirt cheap.