The Baltimore Orioles put first baseman Chris Davis on the 15-day disabled list with a strained left oblique.
The move was retroactive to Saturday. Davis left Friday night's game against Kansas City after four innings with the injury to his side and has not played since.
Davis led the majors last year with 53 homers and 138 RBIs. This season he has two home runs and 13 RBIs in 22 games.
Star outfielder Bryce Harper was placed on the 15-day disabled list by the Washington Nationals with a sprained left thumb. The move is retroactive to Saturday.
Harper hurt his hand with a headfirst slide into third base Friday night after hitting a third-inning, bases-loaded triple in Washington's 11-1 victory. He stayed in the game for an inning before he was replaced.
Harper will fly to Cleveland on Monday to see hand specialist Thomas Graham for a second opinion.
Outfielder Ryan Braun and shortstop Jean Segura were out of the Milwaukee lineup a day after they were injured.
Braun left Saturday's 5-3 win over the Cubs after the eighth inning with a slight chest muscle strain. Braun was also involved with Segura's injury. The slugging outfielder was swinging his bat on the dugout steps in the first inning when he accidentally hit Segura in the face as the shortstop was coming up behind him.
Segura had a partially closed right eye and bruised right cheek.
Manager Ron Roenicke was unsure how long either player might be out, though he didn't expect it to be long.
The Detroit Tigers have put pitcher Anibal Sanchez on the 15-day disabled list because of a blister problem.
The Tigers recalled righthander Justin Miller from triple-A Toledo on Sunday.
Sanchez left in the third inning of Saturday's 5-3 loss to the Twins with a blister on his right middle finger. He is 0-2 with a 3.13 ERA in five starts this season.
Miller got two outs in Friday night's game against Minnesota, then was sent to Toledo.
The Pittsburgh Pirates have shuffled their bullpen, recalling righthander Casey Sadler from triple-A Indianapolis and optioning righthander Jared Hughes to the minors after a one-day stay.
Sunday's Detroit Tigers-Minnesota Twins game in Minneapolis was postponed by rain. No makeup date was announced.