The Lakers will pay Williams roughly $6.7 million in the first year of his contract.
The NBA's most recent salary-cap projection given to teams was $67.1 million. A report on CBS Sports suggested it might climb as high as $69.1 million.
If the cap is set at $67.1 million, the numbers don't quite work for Williams without the Lakers getting creative.
One option is trading away a player, like Ryan Kelly or Nick Young, to open up additional spending power.
The Lakers can also take advantage of timing. Hibbert is set to earn $15.5 million for the coming season but a trade would give him a 15% bonus, paid by the Pacers. If so, the Lakers would need to accommodate $17.8 million of their cap space to bring in the center.
Hibbert can, however, waive the trade bonus — but only if the Lakers cannot accommodate it within their cap room. If the trade is made before signing Williams, the bonus is in effect.
Should Williams sign first, Hibbert would be able to waive his bonus — a decision that involves turning down $2.3 million — allowing the Lakers to fit both players within a $67.1-million salary cap.
The Lakers still have one significant spending tool remaining, the $2.8-million room exception, after which the franchise can add players via minimum contracts.