He seemed up for the challenge during his 26 minutes on court.
“We’re trying to get Joel in increasingly better and better and better shape,” coach Brett Brown said.
Simmons is expected to also sit out Wednesday’s (AEDT) game against the Cleveland Cavaliers.
His fellow Australian Aron Baynes continued his recent fine form for the Phoenix Suns with 14 points and seven rebounds in their 138-112 defeat of the Brooklyn Nets.
Baynes started at centre and played just 18 minutes, sinking two-of-four three-point attempts and shooting 60 per cent from the field in an efficient performance.
The Suns, who were led by 27 points from Devin Booker, won for the fourth time in five games to be 6-3 on the season. They are fifth in the western conference standings.
Baynes’ former Boston Celtics teammate Kyrie Irving – who was averaging 31.9 points per game – was held to just 15 points as the Nets slumped to 4-5.
Elsewhere, Giannis Antetokounmpo had 35 points and 16 rebounds to help the Milwaukee Bucks rally and beat the Oklahoma City Thunder 121-119.
Nikola Jokic hit a fadeaway jumper with 2.4 seconds left to give the Denver Nuggets a 100-98 overtime victory against Minnesota.
The Indiana Pacers beat the Orlando Magic 109-102 for their sixth win of the campaign while Cleveland overwhelmed the New York Knicks 108-87.
In the late games, the Portland Trail Blazers beat the Atlanta Hawks in overtime 124-113 while the Toronto Raptors ended the LA Lakers’ seven-game winning streak, 113-104.