If you take out that one really bad (and I mean bad, 0.1 IP 7ER) by Rivera his ERA is actualy 2. something.
I don't believe that. Let me see your numbers
Not including today. He has thrown 30 innings and given up 15 ER for a 4.50 ERA. Make that 29.9 innings and 8 ER = 2.41 ERA