idk - if he plays well i imagine we'd keep him at least until the 2019 season where we get to keep him an extra year and by playing that extra year we end up taking on only 8mill in dead money - we would save 20m in stead of just under 10m - obviously a post-june 1st designation would split the dead money but if he plays well next year to be a good qb again (which isnt an unreasonable possibility) then i dont see why we wouldnt keep him through 2019 too...
i think 2019 is the major decision point - his cap spikes up to 28m and just before the new CBA so we'd have to look at extending him or cutting him that offseason based on play
obviously if he's bad then we cut him after the 2018 season but there's no reason to get rid of him if he plays well
The most likely scenario is definitely after 2019, but as you said, an awful 2018 isn't an impossibility. There could definitely be a situation where this team has another bad season, and along with a coaching change, the new guys in charge (both Decosta and the HC) try to make their mark on the organization. Wouldn't shock me at all if Decosta tries to leverage Ozzie this year if there's a guy that they like.