Tyrese Maxey scored 26 and hit a 46-footer at the end of the first quarter and a fadeaway to end the third. VJ Edgecombe had 17 points and 13 rebounds and made five 3-pointers. The Sixers went 19 for 44 from 3-point range and committed 11 turnovers to Milwaukee's 22.
Milwaukee won the inside game, 58-26 in the paint, and outrebounded Philadelphia 62-40. Jaime Jaquez Jr. led the Bucks with 21 points, Kel'el Ware had 19 points and 13 rebounds, and Kyle Kuzma added 14 points and 12 rebounds. Myles Turner went scoreless in 20 minutes. Tyler Herro scored 13.
Labaron Philon Jr., the Sixers' first-round pick out of Alabama, made his NBA debut. The AP noted he was drafted to be at least a rotation player before Philadelphia traded for Brown and signed James.
The win follows Thursday's home opener, when the Sixers came back from 29 points down to beat Cleveland, the biggest comeback win for any of James' teams across his 24 seasons, per the AP. Saturday was a quieter night, and it still ended with Philadelphia at 3-0.
Philadelphia hosts Detroit on Sunday. Milwaukee, still looking for its first win, hosts Indiana on Monday.