Conley is not listed in the starting lineup for Tuesday's game against the 76ers, Sean Grande of NBC Sports Boston reports.
Powell (shoulder) is listed as questionable for Wednesday's game versus the Spurs.
Collins (illness) is questionable for Wednesday's game against the Spurs.
Boston recalled Cenac from the G League's Maine Celtics on Monday.
Essengue ended with 10 points (3-7 FG, 0-3 3Pt, 4-5 FT), seven rebounds and one assist in 15 minutes during Sunday's 127-121 loss to the 76ers.
Buzelis recorded 19 points (6-10 FG, 3-7 3Pt, 4-4 FT), five rebounds, two assists and one block in 31 minutes during Sunday's 127-121 loss to the 76ers.
Robinson (illness) is available for Sunday's game against Milwaukee.
Giddey chipped in 19 points (7-12 FG, 1-4 3Pt, 4-5 FT), seven rebounds, 15 assists and one steal in 34 minutes during Sunday's 127-121 loss to the 76ers.
Awaka (knee) is available for Sunday's game against Philadelphia.