Reading this article, there is a line,
While many fans who watched The Last Dance appreciated The Worm’s, uh, free-spiritedness, there is another section of fans who found his actions unprofessional and irresponsible. And they would have every right to feel that way, because, well, that’s certainly been Rodman’s M.O. over the years.
I guess that would mean "my opinion".(I noticed while writing this question.)
If you google "M.O my opinion", the only result is IMO, in my opinion, which I am sure used to.
Please confirm that M.O is not the other meanings such as (from Collins)
mainly US abbreviation for money order US
abbreviation for medical officer
Thank you for your time you spend.