Red Sox general manager Ben Cherington said on Wednesday that the club has not yet picked up Jon Lester's $13 million option for 2014.
Coco Crisp is not in the A's lineup Saturday.
An MRI taken Saturday on Desmond Jennings' left knee showed no major damage.
Chris Sale picked up his 11th victory of the season on Saturday, striking out 13 in the first game of a doubleheader against the Tigers.
Red Sox activated SS Xander Bogaerts from the 7-day disabled list.
George Springer (quad) still isn't able to run at 100 percent effort.
Rangers activated LHP Derek Holland from the 60-day disabled list.
Rangers designated 1B/OF Mike Carp for assignment.
Drew Hutchison allowed just one hit over seven scoreless innings in a win over the Yankees on Saturday.
Jose Bautista accounted for the Blue Jays' offense Saturday against the Yankees with a two-run homer.
Anthony Rizzo (back) is not expected to return to the lineup this weekend.
Rusney Castillo will make his professional debut with the Gulf Coast League Red Sox on Sunday.