According to Robert Murray of FanSided, the Red Sox have signed left-hander Tyler Olson.

Olson signed a minor-league deal with the Cubs on Friday, Mark Feinsand of MLB.com reports.

Olson (infection) became a free agent after refusing an outright assignment to the minors Monday.

Olson (infection) was transferred to the 60-day injured list Sunday, Mandy Bell of MLB.com reports.