3.00 ERA or lower, 30+ IP, 5 or fewer starts, 5 or fewer saves (2008-2010)
Arthur Rhodes (Mariners, Marlins, Reds)
Darren Oliver (Angels, Rangers)
Ramon Ramirez (Royals, Red Sox, Giants)
Mike Adams (Padres)
It's interesting that two of these pitchers (Oliver, Rhodes) are lefties that turned 40 within the past few years. In fact, they're probably going to the be only two left-handed pitchers in baseball who will be over 40 when the season starts.
Ramirez was lights out after being acquired by the Giants at the end of July (0.67 ERA in 27 IP), although he did struggle in the postseason (13.50 ERA in 4 IP).
Adams has quietly been one of the best pitchers in baseball over the last few years. His combined ERA in 2009 and 2010 was 1.39 was 103 innings (the best in baseball of anyone with 70+ IP over the last two years. It's an amazing run and he is one to watch in 2011.