The thing about Street is, we'd have him for the rest of this year, next year, and the year after that. So while we have options for the eighth inning right now (many of them being dubious options, IMO), Street would give us somewhat long-term stability in the ninth inning. That trickles down to the rest of the staff. With Street, Torres becomes locked in to the 8th inning slot for the rest of the year and presumably next year. I'd rather have "lots of options" for the 6th and 7th innings and know exactly what I'm going to have for the 8th and 9th. Street goes a long way to that end.