Well even with 4 LH relievers, that still leaves 4 RHers. As we should know, watching Rocco get outmanaged time after time, PHing for the platoon advantage in the 6th inning has a way of coming back to bite you in the, uh, upper backside of your pants.
I'm not going to worry about too many lefties. However, I AM terrified of the Twins pen.