The New York Mets added a lefty to their bullpen depth, but there’s no guarantee that he’ll make the team, per Per Rich Mancuso of Keep it in the Ring (and to SNY’s Andy Martino for clarifying that the deal was indeed of the minor-league form.
Santiago is a seven-year veteran and completed his second stint with the White Sox last season. He previously pitched with the Angels and Twins after coming up with the White Sox. Last season was the first that he pitched primarily out of the bullpen, but he still made seven starts.