Regarding league differences and environments, ironic you would ask that question because you rely on fWAR--which totally discounts park factors and makes no league adjustments at all. I'm interested in that (are you?) and if we use rWAR we get 4.5 WAR for 2014 Fister, a career high. So, which is it..context of park and league or not?
Funny you mention that. Here is Dave Cameron from his chat on Fangraphs yesterday.
Comment From Guest
since WAR is FIP based, that means it’s not taking park into account right? so WAR would undervalue pitchers in a hitters park? do I have that correct?
Dave Cameron: No, we add in park adjustments when calculating WAR.
12:05
Dave Cameron: Our WAR isn’t just FIP * IP. There’s a bunch of adjustments in there, for league, role, park, the number of infield flies a pitcher generates, the run/win conversion. It’s a pretty complex calculation.
So your wrong. fWAR takes that into account, but I mentioned this in reference to xFIP- which is the league and park adjusted xFIP.
Fister has always been that guy that hit the lower part of the zone and generated weak contact, I'm not arguing that. I like ground ball pitchers. I arguing that with his velocity decline he won't continue to generate weak contact. When a GB pitcher BABIP suddenly drops it is fluky. So while you got memorized watching Fister and thinking he's great the numbers tell a different story. It shows a pitcher who was striking out less people and getting lucky that the balls in play where getting hit at people.
I'm not the only person that discounts ERA, again from Dave Cameron's chat
Dave Cameron: Well I don’t think voters should just vote based on FIP and WAR. I’m not going to. But I do think that mostly the writers have moved from wins to ERA, which is an improvement, but still not ideal.
I do look at ERA. I check it against FIP/xFIP. If the numbers are close, that is a good thing. When ERA is low and FIP/xFIP is high that is usually not a good thing. When ERA is high and FIP/xFIP is low that is an interesting by low guy. Fister is a buy low guy that I have no interest in. The Cubs have room for 1 more starter. If you look at the 2nd/3rd/4th tier guys you can find much better pitchers. I just don't look at FIP/xFIP/ERA though. I also pay attention to GB%, K%, BB%, and velocity. Those numbers can help confirm what I see in when I watch games on MLB.TV. So despite what you think, I do watch a bunch of games, listen to podcasts, etc... I don't take what my eyes say as the final decision maker, though. I like pitchers like Fister, that is why I'm interested in people like Null. They have a self life though. When the velocity and K's drop they get uninteresting very fast. If 2011-2013 Fister was I on the market, he would be one of my first non-Price choices to sign. That pitcher isn't on the market.
The LD% isn't something to hang your hat on either. Those missing line drives became fly balls. More ground balls became fly balls. His FB% jumped 10% that year. His FB% in 2015 stayed high and the LD% went back to his career norm in 2015. It was likely noise. His IFFB% has also been on decline since 2012.
You keep mentioning deGrom and Inciarte like I think they suck. Not wanting to trade for them is different than thinking they suck. deGrom at the time had a low 2 ERA and a 1 ERA at home. His ERA has gone up since then. I think he is a perfectly fine, TORP. I just wouldn't use assests to trade for him that it would take to get him. Inciarte is a nice player. If he as a CF he would likely be a 4 fWAR player this year. I don't want to trade the assests it would take to get him, because I don't like the offensive profile. This doesn't mean I think he sucks or that he'd help the Cubs. The cost/benefit doesn't line up.
In short I take a lot of stuff into consideration, but I'm not going to go just off of what I see. I'm not a scout so if I think something and the numbers don't back it up I will change my mind.