In the comments to the earlier FanShot about the Rangers pitching, Jeff Sullivan mentions that the Rangers are 28th in the majors in FIP.
This is true, but it is also, I think, a little misleading, because FIP doesn't take into account park or league effects. They are, for example, 21st in the majors in ERA, but 14th in ERA+, because of the impact of playing in the A.L. and in TBIA.
The Indians, for example, are .01 ahead of the Rangers in FIP. However, if you include park effects, the Rangers are going to rank ahead of Cleveland.
I think the same is probably true for the Mets, Padres, Pirates, Nationals, Angels, Reds, and Brewers, all of whom are slightly ahead of the Rangers in FIP, but who would probably drop below them in FIP+ (if that were calculated).
So, if you take into account park and league adjustments, the Rangers pitching staff is probably below average, but sitting around 20th to 22nd, not 28th.