Instead of bunching up each one here is overview of each:

1- Yanks; all though I don't like them; too many questions for Boston. New York has their problems with Knoblauch playing left and Orlando Hernandez injury unclear along with Mendoza hurt. New York lost some key bullpen guys, but they picked up Mussina who will give you many more innings then Cone did so the pressure should be relieved.
2- Boston; Rumors are out that Nomar needs surgery, if true hurts team dramatically, because you will not know when he will be back, and when he will be 100%. Manny with a bad hamstring, hopefully it gets better, but those things can linger. With Nomar the sticks are better than the Yanks, the starters are close just merely on Pedro.
3- Toronto trading of Wells hurts becasue of innings eater and uncertain on Sirotka. The offense shall carry this team. They can sneak into playoffs but will have to have a couple guys step-up in the pitching rotation.
4- Tampa Bay this team has the greatest potential over last year. On the following conditions if Vaughn and Castilla can put up numbers like they did a few years ago. And if Guzman and Alvarez can produce, remember they were hurt last year.
5- Baltimore Belle will cost this franchise his injury takes any pop this line-up did have out. young pitchers in Ponson,Johnson and Kohlmeier.

So my overview would be Yanks win. But Boston has the potential to over take if they can stay healthy and Yanks can't. Toronto will stay close until August when pitching arms will tire.