Lawrence isn't stupid. He's taking himself out of the games (if that's the case, it appears to be, but nobody knows for sure) for two reasons:
1. Why risk injury? If Dallas doesn't offer him a new deal, there will be more than a few who will offer him money. Let teams remember his good years, not this year. Regardless of what some believe here, he still has some gas left in the tank, he can rush the passer and play the run. He's sealed the edge for Dallas for years, but because he doesn't get a lot of sacks folks think he's just goofing off on the edge, but from the poor run defense we've seen for the last couple of years not having him in there shows.
2. Why continue to play for a team so poorly run? He gets paid whether he plays or not. Losing games is no fun at all, IF the Cowboys had any real hope of getting back into contention Lawrence, and others, would play harder so as to feel good about contributing to the re-build. But playing for a loser organization, wht no chance of making a SB or even a meaningful amount of playoff games is nothing but frustating.
Yes, I know, and expect, players to play up to their ability regardless of how the team is going. But human nature steps in, realistically how many of us have continued to work hard as possible when your work isn't really doing anything. I saw many of my coworkers slough off in their job when the job was unappreciated, and just did the minimum. Playing in the NFL is no different. And I think he did play hard for a number of years, but eventually just got discouraged. He saw Witten bust his butt for years and years and never got much post season success, and essentially wasted his career in Dallas. His reward of the HOF as a consolation prize only goes so far, and is something to be appreciated later in life, after the sting of no rings is lessened.
Can't blame Lawrence too much, he was poisoned by Jerry's imbecility...