John Jaso will be placed on the 7-day concussion disabled list.
Susan Slusser of the San Francisco Chronicle reports that John Jaso has admitted to worsening concussion symptoms over the past two weeks.
John Jaso went 2-for-5 and drove home three runs on Sunday, leading the Athletics to a 9-3 victory over the Rangers in Texas.
John Jaso (knee) has returned to the Athletics starting lineup for Sunday's game against the Rangers.
John Jaso exited Saturday's game versus the Rangers with left knee irritation.
John Jaso went 2-for-3 with an RBI in a win over the Blue Jays on Sunday.
John Jaso went 2-for-6 with four RBI in Sunday's lopsided win over the Orioles.
John Jaso went 2-for-4 with a solo homer Thursday against the Yankees.
John Jaso launched a two-run homer in his return to the lineup Tuesday.
John Jaso (back) flied out as a pinch-hitter in the A's loss to the Blue Jays on Sunday afternoon.
John Jaso (back) is expected to return to the Athletics lineup on Monday.
John Jaso remains out of the Athletics starting lineup for Saturday's contest against the Blue Jays.
John Jaso is not in the Athletics' lineup Friday because he's dealing with a little tightness after playing on turf the last few days.
John Jaso homered in the third and delivered a game-winning double in the 10th as the A's beat the Nationals 4-3 on Saturday.