Red Sox are scared of Matusz and Bergesen.
http://www.weei.com/sports/boston/baseball/red-sox/alex-speier/2011/01/09/matt-garza-and-red-sox-killers-look-top-pitcheQuote
Brian Matusz: 2-0, 2.43 ERA, five starts. This one doesn't bode terribly well for the Sox, since Matusz just completed his rookie campaign for the Orioles, and looms as a tough divisional foe for years to come. He was dazzling against the Sox, and proved particularly confounding to J.D. Drew and David Ortiz (a combined 0-for-14 with 12 punchouts).
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Brad Bergesen: 2-3, 3.32, six starts. The Orioles right-hander has struck out just 4.5 batters per nine innings in his career, but he's punched out 6.2 Sox per nine innings in his outings against them. Even so, as a right-hander without strikeout stuff, he is arguably the most surprising pitcher on this list.
And now that Garza is traded to the Cubs that means Matusz is the pitcher they fear the most