Caris LeVert's team-high 20 points fueled Wednesday's victory over Toronto, ending the Raptors' 15-game winning streak.
Williamson set and reset his career high in scoring with 31 points in Tuesday's win over the Blazers, followed by 32 in Thursday's 123-118 loss to the Thunder.
Dallas is 5-6 in the 11 games Luka Doncic missed with ankle sprains before the break, a surprisingly competent figure considering the sophomore All-Star's total control of its attack.
Tuesday's 110-103 win over the Clippers ran Philadelphia's home record to 25-2 and saw Simmons play one of his best games of the season.
The Sixers hit the break on a three-game winning streak.