Should you be interested, I recently wrote a piece over in the Community Research section of Fangraphs breaking down the extreme difference between Jason Marquis’ very solid ERA and his all-time awful FIP. Not only is Marquis over-performing, he’s over-performing at an unprecedented level. I’ve mixed in some historical data and a comparison to a current MLB pitcher who has the same peripheral numbers but a much worse ERA. I hope you find the analysis interesting.
Check out the entire thing over at Fangraphs.