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Celtics Nightly Desk · injury report · Sunday, October 18

Devin Carter out vs Pistons with mononucleosis

Day-To-Day→OutIllness · Other

Carter has been diagnosed with mononucleosis and is without a timetable for a return, Gary Washburn of The Boston Globe reports.

22
Devin Carter
Boston Celtics · G · #22
Next game
vs Knicks
Fri, Oct 23 · 7:00 PM ET · Prime Video
Expected return
2026-11-08
report checked 5 min ago
2025-26 line
8.9 · 3.3 · 2.7
pts · reb · ast · 38 gp · 18.4 min
Celtics this season
0-0 with · 0-1 without
regular season record with and without him
By the Celtics Nightly Desk · 3 d ago

Devin Carter was ruled out Sunday after a mononucleosis diagnosis, moving off the day-to-day tag he carried for illness. He will miss Boston's trip to Detroit on Tuesday with no timetable given by the team.

What happened

The Celtics moved Carter from day-to-day to out on Sunday, Oct. 18 at 11:04 a.m. ET, listing the issue as illness, other. Gary Washburn of The Boston Globe reports Carter has been diagnosed with mononucleosis and is without a timetable for a return. Carter had cycled through the day-to-day tag for illness twice in recent days, including a stretch on Oct. 17 when he was cleared before landing back on the injury report, and an earlier day-to-day listing on Oct. 10 that was first tied to rest.

What it means for the Celtics

Carter will sit out Boston's trip to Detroit on Tuesday, Oct. 20 at 3 p.m. ET on NBC/Peacock. Last season he averaged 8.9 points, 3.3 rebounds and 2.7 assists in 18.4 minutes across 38 games. The Celtics have not played a regular-season game yet this year, so there is no record to compare with or without him. In the backcourt rotation, Derrick White, Payton Pritchard and Anfernee Simons are the guards positioned to absorb the minutes Carter would have played.

What to watch

Carter has no timetable for a return per the injury report, though an expected return date of Oct. 27 is being tracked. Watch for the next injury report update as the Celtics approach their game at Detroit on Tuesday and the games that follow in the opening week of the season.

Is Devin Carter playing vs Pistons on Tuesday?

No. Carter is out with mononucleosis and will miss the Oct. 20 game at Detroit.

When will Devin Carter be back?

The injury report lists no timetable for his return, though his expected return date is being tracked for Oct. 27.

By the Celtics Nightly Desk, from the data on this page, rewritten when the data changes. How the desks work.
Next up · Fri, Oct 23
Knicks at Celtics
7:00 PM ET · Prime Video

Who picks up the minutes

this season
Jayson Tatum37.8 min · 13.0 pts
Derrick White35.9 min · 17.0 pts
Paul George30.6 min · 38.0 pts
Payton Pritchard27.5 min · 17.0 pts
The rotation by minutes, minus him. Full rotation tracker →

Celtics report now

full report →
Nobody else on the Celtics report.

More Celtics injury updates

league report →

Status and detail from the official injury report as published; return dates only when the report gives one. Times ET.