Friday's intriguing matchups

OAK: Zito (0-8, 6.25) vs.
FLA: Olsen (4-1, 2.82)
*Zito's been respectable the last three times out. Olsen's walk numbers point to an inevitable collapse.

ARI: Davis (1-1, 3.72) vs.
ATL Reyes (2-1, 4.12)
*Davis makes his first start back from thyroid cancer. Reyes is still looking for his first quality start.

NYM: Perez (4-3, 4.25) vs.
COL: Reynolds (0-1, 3.09)
*Perez dominated the Yankees last time out. Reynolds is a first-round pick cutting his teeth in the Bigs.

LAA: Saunders (7-2, 2.48) vs.
CWS: Floyd (4-2, 2.92)
*Two of this season's biggest surprises go head-to-head.

KC: Greinke (5-1, 2.18) vs.
TOR: Halladay (4-5, 3.38)
*Greinke has yet to give up more than three runs in an outing. Halladay last pitched in relief.

MIN: Slowey (0-4, 5.49) vs.
DET: Galarraga (3-1, 3.06)
*Slowey, who's lost all of his starts this season, beat Detroit the only time he faced them last season. Galarraga is trying to keep a starting job.