Why can Davis do that? He can strike batters out, Maddux can't anymore (not that he was a big K guy to begin with). Davis' K/9 rate is above 7 while Maddux is in the mid 5s. Which means he requires more help from his D, not exactly the Brewer strong point. For example in 2005 (given the two teams, 2006 is harder to compute), his ERA was 4.24 while his DERA was 4.46. Similarly in 2004 his ERA was 4.02 while his DERA was 4.19. Add in Maddux will likely cost at least $3 million more than Davis next season.