Marquis hasn't had one bad year though. At his best, he's been good, at his worst, he's been terrible, overall, he has been bad. Overall, his career ERA+ is 94 and his WHIP is 1.42. That's a little below average, but not bad. Bad is worse than that - i.e., Marshall, Marmol, Rusch, Prior or Guzman last year. And the point about Beltre was that he was judged to be a great player on the basis of one year, that just happened to be the right year (before free agency). People are all over the Jennings bandwagon, but he was basically Gil Meche before a great 2006.