Red Sox: 76.2%
A pretty clear-cut response here, despite some possible biased Red Sox fans voting. However, I too voted for the Red Sox. I think with all of the offseason moves the Red Sox have made, plus with their previously loaded team, they are definitely the scariest team besides us in the AL East.
For the Rays, they lose their element of surprise that they had last season. Teams will know to watch out for them from the beginning. Also, I will be interested to see how David Price fares as a starter this year. I know he was excellent for them in the September and the playoffs last year, but I see him as a two-pitch pitcher, which might not hold up when he faces batters for the second time around.
Joba Chamberlain has made noticeable adjustments in his conversion from Starter to setup man back to starter.
However, look out for Pat Burrell on the Rays (pretty much their only significant offseason move).