Now I'm really confused. Sitton had both designations, and somebody just said Pro Bowl isn't significant, so I included All Pro. Just trying to establish some way to rate players when someone suggests a particular guy isn't worthy. What guideline would be appropriate if the basic contention is that Sitton was a really, really good guard when he was cut?
I'm not sure why the Sitton situation is being rehashed. Taylor has proved to be a surprisingly adequate replacement, and of all the troubles with this team, the O-Line should be the least of the concerns.
Anyway, how you judge is up to you. First team All Pro or a decent number All Pro votes or Pro Bowl recognition indicates a player had a good season while a few reputational exceptions might be tossed in. But no award vote is foolproof.
Last season Sitton was third in All Pro voting with 11 votes. Lang got 1 vote. The previous year Sitton got 22 votes, Lang got none. On balance, I'd say Lang outplayed him in 2014 and was his match in 2015 while struggling with his own injuries. Where you could see the difference is in Sitton's loss of mobility getting out to the second level.
These votes tell you that Sitton was at least a good guard, but not necessarily a really, really good one, nor does it tell you the relative value of the 2 players in question. Most of the voters know both players were good but probably didn't watch them very much. I'm sure at least some of them said to themselves, "Sitton is the LG, I'll throw him my vote".
With the big free agent class looming after this season, it was pretty obvious they were not going to keep all these O-Linemen. Once it was decided they were going to pay Bakhtiari top dollar, at best there was going to be an offseason choice to be made between Sitton and Lang. So, the only question remains, "why then and not later?"
Two plausible reasons:
1) Baktiari's price tag can in higher than expected; cutting Sitton bought some cap to carryover to 2017.
2) They liked what they saw from Taylor in preseason to deem him an adequate replacement.
There was a lot of chatter about Sitton being disruptive in the clubhouse. That may be. But clubhouse lawyers are not born overnight. He might have been carping to his mates about not being offered an extension, but that's hardly a disqualifier. It would only come into play when other factors, such as those noted above, start to weigh against a guy.