Sean Doolittle (intercostal) has yet to resume baseball activities.
Athletics placed LHP Sean Doolittle on the 15-day disabled list with a strained right intercostal muscle.
Sean Doolittle will undergo an MRI exam on Sunday for pain that he's experiencing in his intercostal area.
Sean Doolittle notched the save as the A's beat the Angels 2-1 on Saturday, but reportedly felt some side pain on his next-to-last pitch.
Sean Doolittle pitched a perfect ninth to pick up his seventeenth save of the season on Tuesday.
Sean Doolittle stemmed the tide of a five-run Astros comeback attempt to earn his 15th save in Wednesday's win.
Sean Doolittle got four outs for his 14th save on Sunday, closing out a win over the Mariners.
Sean Doolittle allowed a solo home run but closed out the Blue Jays on Sunday for his 13th save of the season.
Sean Doolittle struck out two in a shutout ninth inning to pick up his 12th save in Thursday's win over the Blue Jays.
Sean Doolittle gave up a walkoff grand slam to Rajai Davis in the ninth inning of Monday's loss to the Tigers.
Sean Doolittle struck out the side in the ninth inning to pick up his 11th save in Wednesday's win over the Mets.
Sean Doolittle picked up his ninth save of the season Wednesday in the A's 4-2 defeat of the Rangers.
Sean Doolittle slammed the door on the Orioles in the 11th inning on Friday, striking out each of the three hitters that he faced to protect a one-run advantage.
Sean Doolittle worked a perfect ninth inning to pick up his seventh save in Wednesday's win over the Yankees.