Bud Norris fired 7 1/3 innings of scoreless ball Wednesday in the Astros' 2-0 victory over the Cardinals.
John Danks (shoulder) will be activated from the disabled list to make his season debut Friday against the Marlins.
Clay Buchholz moved to 7-0 on Wednesday after holding the White Sox to one run over seven innings.
Chris Davis went 4-for-4 with his 14th home run Wednesday, and the Orioles beat the Yankees 6-3.
Yankees manager Joe Girardi said he would be "shocked" if Hiroki Kuroda (calf) was unable to make his next start.
Francisco Liriano fired seven scoreless innings Wednesday in the Pirates' 1-0 victory over the Cubs.
C.J. Wilson allowed just one run over eight innings of the Angels' 7-1 win over the Mariners on Wednesday.
Cliff Lee overwhelmed the Marlins Wednesday, going the distance while allowing just three hits, two walks and no runs while striking out five in the 3-0 win.
Delmon Young homered for the second straight game in Wednesday's win over the Marlins.
Rockies optioned 2B Josh Rutledge to Triple-A Colorado Springs.
Kevin Slowey left Wednesday's start against the Phillies after the fifth inning with a left lat strain.
Jake Westbrook had to stop his bullpen session Wednesday after 20 pitches due to pain in his right elbow.