The Red Sox have signed lefty reliever Jose Mijares to a minor league deal with an invitation to spring training, reports Ken Rosenthal of FOX Sports. Mijares, 29, has had mixed results over the last four seasons, but has shown that he has the potential to be effective out of the bullpen.

Last season, with the Giants, Mijares posted a 4.22 ERA in 49 innings. He was victimized by a .416 batting average on balls in play, so it stands to reason if all else remains the same, he should find more success in 2014.