What happened: Commissioner Adam Silver said the NBA's second tax apron is working "incredibly well," pointing to the system that shaped the Jaylen Brown trade. Boston sent Brown to Philadelphia earlier this offseason, receiving Paul George and four draft picks in return.

Why it matters: The comments follow Silver's remarks a day earlier ruling out CBA changes sought by Celtics president Brad Stevens, who blamed the apron rules for forcing the move that ended Jaylen Brown's Celtics tenure. The players' union has separately ripped the salary cap system, arguing it forced a stunning trade.

What to watch: Watch for further reaction from Stevens and Boston's front office as the league heads toward training camp under the tighter cap rules.