Second lefty, Redding, and Borchard.
I'm thinking Javier Lopez will be the second lefty just because of his submarine/sidearm delivery. The Sox wanted Mike Myers but he signed with the Yankees. If Lopez shows some control in ST, he may be the ideal guy to get one or two lefties out with that wacky delivery. I think Redding will be the long reliever/mop-up man. He is supposed to have his velocity back (hitting 92 MPH again) and he has a good assortment of pitches.