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.