I still believe that Jim Mecir is worth looking at for Vizcaino's spot.
http://sports.espn.go.com/mlb/players/profile?statsId=5506
He's 35 but he had a good '05.
3.12 ERA, 1.29WHIP, 34 K in 43.1 IP
He pitches better to lefties than righties (.226 BA against vs LHB versus .263 vs RHB)
He has a screwball he throws which is dynamite.
His career ERA is under 4.00 which is fairly decent in this day and age.