Smart move. There's an opt-out (for the player) the last year of the deal, so it's basically a two-year deal, as Parsons will try to lock up another big deal after the first two (unless he gets injured or some freaky event like that, in which case it's still a tradable asset that last year). And this means Houston has to decide in three days if they match the offer (putting and end to their chance to add a max contract) or to let him go and keep pursuing Bosh. If they're smart, the Rockets will go hard after Bosh and the Mavs will revamp their frontline with Parsons and Chandler, which makes them a playoff contender again. Anything can happen, tho. This offseason has been crazy so far.