Baynes was ruled out for Wednesday night's preseason game against the Toronto Raptors. With a protective mask, he is expected to be available to play when Detroit opens the regular season next week at Toronto.
Baynes broke his nose in Tuesday's practice and had surgery the same day.
The 6-foot-10 Australian played in the Olympics last summer. He averaged 6.3 points and 4.7 rebounds last season, his first with the Pistons after three with the San Antonio Spurs.