War can be a misleading stat for a pitcher like porcello. First of all, it relies on fip. According to fangraphs, the formula they use to calculate it is ((13xhr) + 3x(bb + hbp) - 2k)/IP + the fip constant. The thing overrates walks, underrates strikeouts, and doesn't even consider the amount of hard contact the pitcher gives up. Because he doesn't give up a lot of walks, he is saved. A lot of the times, his fip and era are quite different from each other and for his career , they are off by nearly half a run. If you look at all of the truly great pitchers and look at their career fips vs eras, they come out pretty close to each other. Rick Porcello is a mediocre pitcher who is saved by fip. Even Verlander and Scherzer, who pitched infront of the same defense as Porcello, have career era and fips that are .18 and .8 away from each other.