In an effort to add some depth and perhaps some versatility to their bullpen, the Boston Red Sox signed left-handed relief pitcher Jose Mijares to a one-year deal on Friday (reported by Ken Rosenthal of Fox Sports).
Zach Links of MLB Trade Rumors breaks down the details.
Pitching for the San Francisco Giants last season, Mijares appeared in 60 games. His 4.22 ERA and 1.78 WHIP leave much to be desired, but he was much more successful in seasons prior. In his career he has been relatively effective getting left-handed hitters, holding them to a .225 average. The Giants did not use him in a specialist type role, however, and so the Red Sox probably do not envision him there either.
Prior to San Francisco, Mijares pitched for the Minnesota Twins and Kansas City Royals. He has a track record, and the Red Sox could do a lot worse when it comes to low-risk options. If he makes the roster, it adds an arm to their bullpen (and a guy who is internet famous for some antics while hanging out in said bullpen). If not, they will experience no heartache and move on.