A’s Mazzaro likely to miss “1 or 2” starts

So we’ll get our second look at right-hander Clayton Mortensen tonight as he fills in for Vin Mazzaro. Obviously, Mortensen wasn’t the most heralded of the three players the A’s obtained for Matt Holliday (Brett Wallace holds that distinction). But Mortensen can help himself with a solid outing because it looks like Mazzaro, suffering from shoulder tendinitis, could miss two starts. So pitching well tonight could earn Mortensen a second start.

According to Mazzaro, his shoulder started bothering him about two starts ago. “I didn’t really recover the way I normally do,” Mazzaro said. “I felt a little soreness. … I’ll get a few days off and bounce back. I’ll probably miss one or two starts. I’ll start throwing in five or six days. I’d like to get two or three more (starts before the season ends).”

He said his shoulder feels better today, but this is all new territory for him. He’s never had any shoulder or arm problems before, so he doesn’t know how to gauge the severity of an injury based on how it feels.

A’s manager Bob Geren said Mazzaro has to get through a side session with no problems before being considered for his next outing, but he added that there’s no thought (yet) to shutting the rookie down for the season.

Mortensen gave up eight runs in four innings in his A’s debut on Aug. 8 in Kansas City, and he was sent back to the minors immediately after that. Geren said Mortensen has terrific natural movement on his pitches, and that his key is just staying around the plate and letting that movement work for him (sounds similar to Trevor Cahill).

Two faces in tonight’s lineup that you haven’t seen for a while: Bobby Crosby playing first base and Nomar Garciaparra at DH. Geren wanted to get as many righties as possible in the lineup, as Mariners left-hander Ryan Rowland-Smith is very tough on lefties. With Adam Kennedy showing some recent life at the plate (three straight multi-hit games), Geren wanted to keep him out there at third. But that guy is gonna need a rest one of these days, I’d say. …

Tonight’s lineups, featuring Mike Sweeney as a late replacement for Ken Griffey Jr. as Seattle’s DH …
Kennedy 3B
Davis CF
Suzuki C
Hairston LF
Nomar DH
Ellis 2B
Crosby 1B
Sweeney RF
Pennington SS

Mortensen RHP

Ichiro RF
Gutierrez CF
Lopez 2B
Sweeney DH
Beltre 3B
Hall LF
Carp 1B
Johjima C
Wilson SS

Rowland-Smith LHP

Joe Stiglich