Astros sent RHP Kyle Weiland outright to Triple-A Oklahoma City.
Aroldis Chapman earned his 12th save of the season Saturday in the Reds' 5-2 defeat of the Cubs.
Brewers placed RHP Jim Henderson on the 15-day disabled list with a strained right hamstring.
Pedro Alvarez hit two home runs and drove in three in the Pirates' 5-2 win over the Brewers on Saturday.
Chris Sale (shoulder) played catch on Saturday and has deemed himself ready to make his Tuesday start.
Jake Westbrook (elbow) will seek a second opinion next week, likely from Dr. James Andrews.
Chris Carpenter (shoulder, neck) did not feel good after his latest bullpen session so the Cardinals are backing him off his current throwing program.
Dustin Pedroia had a go-ahead RBI double in Saturday's 7-4 win over the Indians.
Royals placed C Salvador Perez on the bereavement list.
Ross Detwiler (back) threw a bullpen session Saturday and reported feeling fine.
Yankees placed OF Curtis Granderson on the 15-day disabled list with a fractured fifth metacarpal of his left hand.
Jered Weaver (elbow) is expected to start Wednesday against the Dodgers.