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Cahill adding to his arsenal

Something to look for tonight from Trevor Cahill: Bob Geren says he’s been working to perfect a “front-door” sinker against left-handed batters. The pitch basically starts at a guy’s hip and works its way back over the plate. It takes a lot of confidence and trust in the pitch to throw it, because you’re basically aiming for a hitter knowing the pitch will tail back. “It’s not something that’s easily perfected, but it’s almost like having a new pitch,” Geren said. He added that not many pitchers utilize a front-door sinker, but Greg Maddux is an example of somebody who’s had incredible success w/it …

–Checked in w/Ryan Sweeney about his left knee, and he doesn’t sound all that optimistic right now. The A’s staff doesn’t want him to hit or run today. Sweeney found out yesterday he has a sprained MCL. “It’s irritated, so if I start doing stuff it’s going to flare up,” he said. “It’s frustrating.” No talk of the DL yet for Sweeney.

–Geren said he doesn’t expect Nomar Garciaparra to come off the DL when he’s eligible Monday, not a big surprise considering he hadn’t done much in the way of baseball activity since going on the DL.

–Tough news on reliever Dan Giese, who is having Tommy John surgery Tuesday w/Dr. Lewis Yocum. He thought his ulnar nerve simply needed to be moved, but his ulnar collateral ligament was torn, which was causing all the pain with his nerve. He’ll definitely be out at least a full year.

The lineups for tonight’s game, serving as a Jordin Sparks opening act:

A’s
Cabrera SS
Kennedy 2B
Cust DH
Holliday LF
Giambi 1B
Suzuki C
Cunningham RF
Hannahan 3B
Davis CF

Cahill P

Orioles
Roberts 2B
Markakis RF
Jones CF
Scott DH
Huff 1B
Mora 3B
Zaun C
Pie LF
Andino SS

Berken P

Joe Stiglich