More than 600, or 43%, of misconduct allegations were closed after officers could not be identified, raising a big obstacle in the board's review, the report said.
The New York Police Department (NYPD) objected to many of the report's findings, saying less than 15% of all allegations were substantiated.
Hundreds of officers were injured and the department had already implemented many of the 17 policy changes recommended by the board, NYPD said.
Of the 146 officers cited by the report, 89 of them should face internal charges, which can result in termination.
The board recommended discipline, which can include the loss of vacation days, for the other 57 officers.