Derek Lowe and the Red Sox beat the Orioles today 6-4 to run Lowe's win total on the year to 20. I would have to believe that he is now back in the lead for the AL Cy Young. Pedro Martinez seemed to pass him after the All-Star break but his injury prevents him from competing further at least so far this season. Pedro's strikekouts and ERA are better, but Lowe has 20 and Martinez may not be able to get there. Barry Zito, the other man in this three-legged race, has 21 wins but is behind both Martinez and Low in ERA.
Baseball Prospectus rates Lowe the highest of the three in Support Neutral Wins Above Replacement. One other thing is that both Pedro and Zito have a higher number of uneraned runs record (Lowe has 2, Martinez 12, Zito 8.