If the Rockets had signed Lopez for $25 million and Fred VanVleet for $40 million, then they needed to put together a complex sign-and-trade to acquire Brooks because otherwise they weren’t going to have enough cap room.
It appears Houston was well on its way to doing so via the rarely used tactic of under-the-cap salary aggregation. Veterans of the 2014 Ömer Aşık sign-and-trade to New Orleans, when the Pelicans spent several days scraping together the league’s assorted barrels for minimum guys to throw into the deal, may recognize what happened here.
The nitty gritty: Normally you can’t trade for a player (such as Patty Mills), and then immediately aggregate him with other contracts (such as TyTy Washington, Usman Garuba, Patrick Christopher and Kenyon Martin Jr.) to trade for a higher-salaried player. League rules require teams to wait at least 90 days before that can happen.
However, the fine print contains one exception: if a player is acquired with cap space. In that scenario, teams are free to aggregate immediately. So once the Rockets had a deal in place to acquire Mills, they could use him and the four players already on their roster, take advantage of the new CBA’s liberalized salary-matching bands, and be able to take Brooks back in a sign-and-trade even with a frontloaded contract.
It cost the Rockets five second-round picks and cash to put this all together, however, (they got two back for Martin from the Clippers, but still), not to mention drop-kicking three recent first-round picks, and in the end that they didn’t even need the extra wiggle room once Lopez spurned them.
Houston pivoted to using that space by inking Jeff Green and Jock Landale to be walking trade exceptions, with fairly large first-year salaries followed by non-guaranteed second seasons. (Landale’s runs four years and is only guaranteed for the first.) Green, in particular, was originally slated to go into the Rockets’ $7.3 million room exception but now will have a larger $9.6 million cap hit (including the maximum allowable 20 percent in incentives), enabling him to be used in a trade for up to $17 million in returning salary come January.