Josh Beckett and DIPS Theory
Last year, Josh Beckett posted a 5.78 ERA in 21 starts, and his struggles were one of the main reasons the Red Sox missed the playoffs. This year, Josh Beckett has a 1.86 ERA in 14 starts, and his dominance is one of the reasons that the Red Sox have the best record in the American League. A look beyond ERA, however, shows that Beckett is the poster boy for why metrics like xFIP were created in the first place.
Last year, Beckett had an xFIP of 3.86, 8% below league average. This year, Beckett is posting a 3.69 xFIP, 8% below the league average. In fact, his K/BB ratio is almost exactly identical (2.58 last year, 2.63 this year) to what it was a year ago. His ERA has been slashed by over four runs thanks to huge reductions in two factors that are counted in xFIP – BABIP and HR/FB.
