Your team isnt bad. A lot of questions marks though. Loretta being the third basemen is a question. Given in his 100 or so games he had good average, very little power and very little SB. He is only going to help you in average. Bautista is also a question mark. I like him a lot and put up great numbers in his 40 games, but one has to wonder whether or not he can do this for an entire season. Hopefully Alou will be solid if Bautista goes down. Also Rivas isnt that great. He will help you will steals and will have an OK average, but power wise don't expect much. Huff or Giambi should be OK at utility but both question marks.
Pitching wise, closing you look good. Have two premiere closers. Even with Rivera's year last year, his career should leave you with no questions as to whether or not he will bounce back. Starting pitching is a whole other issue. Ortiz and Colon will be solid, and I think that Lackey will also be solid. I dont think El Duque or Dessens will have great seasons. Dessens won't repeat his ERA in my opinion and El Duque doesn't have the Yankees backing him up this year and that should cause some concern.
So you team has a whole lot of question marks and you are most likely going to have to do a lot of pick-ups, trades, and drops throughout the season to be successful.