From the best Knicks beat reporter, Ian Begley (click those links, people):
Mitchell Robinson will not be with the Knicks during their voluntary team workouts in a “bubble” setting due to personal reasons, league sources told SNY.
The third-year center, who participated with the Knicks during voluntary individual workouts last week, does not have COVID-19, league sources say.
The Knicks will begin their team workouts on Wednesday. Per NBA rules, the workouts can run through Oct. 6. All teams who did not get an invite to the Orlando bubble are allowed to have voluntary team workouts in a bubble setting.