Programming note: A's-Blue Jays coverage starts this morning at 9 a.m. with A's Pregame Live on CSN California.
The Blue Jays are the hottest team in baseball.
Sonny Gray is one of the best pitchers in baseball.
But the A's ace will not face Toronto on Thursday because of back spasms, the team announced.
Jesse Chavez, who was slated to start on Friday in Baltimore, will take the mound in Gray's place.
Gray is 12-4 with a 2.06 ERA through 23 starts this season.
The Blue Jays have won 10 in a row and lead MLB in runs (611), OBP (.331), slugging percentage (.445) and OPS (.776).
They are second in home runs (156).
1. Billy Burns (S) CF
2. Mark Canha (R) 1B
3. Brett Lawrie (R) 2B
4. Danny Valencia (R) 3B
5. Josh Phegley (R) C
6. Billy Butler (R) DH
7. Josh Reddick (L) RF
8. Coco Crisp (S) LF
9. Marcus Semien (R) SS
P. Jesse Chavez (6-11, 3.73 ERA)
Blue Jays (63-52)
1. Ben Revere (L) LF
2. Josh Donaldson (R) 3B
3. Jose Bautista (R) RF
4. Chris Colabello (R) DH
5. Dioner Navarro (S) C
6. Justin Smoak (S) 1B
7. Kevin Pillar (R) CF
8. Ryan Goins (L) SS
9. Cliff Pennington (S) 2B
P. Mark Buehrle (12-5, 3.34 ERA)