ERA is a flawed stat for relievers. Eyre had a 1.48 WHIP and 800 OPS against, that is not good. To put that in perspective, only one team bullpen had a higher OPS against and only 3 had a higher WHIP, in the NL. That's counting all relievers, not just the millionaires who are guaranteed for 3 years. Why is ERA a flawed stat for relievers? Not trying to start an argument, I'm just curious as to why you think this. For example, Reliever A enters the game, gets two men out, then walks two guys and is pulled for reliever B. Reliever B comes into a game, allows a bases clearing triple before striking out the last batter. Reliever B's ERA for that outing is 0.00, even though he was not really effective. Reliever A is charged with two runs, and maybe he should be, but he was just as effective, if not moreso than Reliever B. For that reason, ERA while somewhat informative on a reliever, is not the best way to judge one. It's certainly not as reliable a metric for a reliever as it is for a starter.