Coming off an extremely embarrasing home loss, where their ace got shalacked and they were once again held in check by Marcum. Boston is 55-44 against RHP and Baltimore is 12-17 against LHP. Jon Lester has developed into a dominant left-handed pitcher. Jeremy Guthrie's last time out against Boston he went: 4 2/3, gave up 7 hits, 5 ER, 5 BB and just 1 strikeout. Jon Lester at -130 is a bargain especially with the situation and history. 15 runs and 22 hits against one of the best teams in baseball at their house, I believe a fire is lit under there ass after today or should be. No Adam Jones, Markakis and Huff both left-handed bats against Lester. Expecting Boston to post at least 5-6 runs, that should be enough for Lester. Baltimore scored 16 runs yesterday and had 22 hits, expect a let-down in runs.
Basically that's why it is a lock.