The Red Sox have signed lefthander reliever Rafael Perez to a minor league deal, pending a physical, a team source has confirmed.
Perez, who was spotted at Fenway Park this afternoon, was non-tendered by the Indians in November after being limited to eight appearances in 2012 because of a shoulder injury.
He had surgery in September. He was signed by the Twins in February but wasn't back to what he used to be in his brief time with them.
For five seasons with the Indians, Perez was considered one of the best set-up men in baseball. He has a career 3.64 ERA, and three times he made 70-plus appearances in a season.
The Red Sox are expected to assign Perez to either Portland or Pawtucket after results of his physical are known.