Josh Beckett - The Sox ace was dominant again in 2009. He won the second most games of his career (17), while pitching in a career high 212 innings. Beckett will be playing for a new contract this season so expect him to have a career year.
Jon Lester - It took Lester a little while to get going in 2009, but once he found his game, he never looked back. Lester went 15-8 with an ERA of 3.41. The amazing part is that five of his losses came in the first two months. Lester will probably rebound to win close to 20 games but it is also very important for the Sox to watch his innings.
John Lackey - The Sox prized free agent signing of this offseason is John Lackey. After starting the season on the disabled list, Lackey finished the season with an 11-8 record and an ERA of 3.83. While those numbers do not jump off of the screen, we all know what Lackey is capable of. He is a big game pitcher that makes the most feared rotation in baseball even better. Not to mention, Lackey was probably thinking, "if you can't beat 'em, join 'em."
Daisuke Matsuzaka - Last year was a disaster for Dice-K. He showed up to spring training out of shape and did nothing to help himself out. He got off to a disastrous start and was placed on the DL for about three months. When he came back, he did pitch well, so that might be a saving grace for Dice-K. Expect Matsuzaka to win somewhere around 15 games in 2010.
Tim Wakefield - Wake got off to the best start of his career and was even selected to his first All-Star Game in 2009. A back injury forced him to miss time yet again but he still went 11-5 for the Sox. Wake might be the odd man out in the rotation just because of his age, so it will be interesting to see how he does in 2010.
Clay Buchholz - The Sox starters go six deep right now. We finally saw the emergence of Buchholz in 2009. He went 7-4 with an ERA of 4.21 in 2009. These numbers do not tell the full story as Clay was the glue that kept the Sox in the playoff picture in the middle of the season. Whether the Sox keep Clay or trade him, keep an eye on him as he will finally get a chance to be a full-time starter.