Boone said the Yankees’ full ALDS roster will be announced on Friday.
The decision means Sabathia, who serves as a baseball analyst for ESPN, will miss at least the first round of the playoffs in his final season as a major leaguer.
The Yankees placed the 39-year-old left-hander in the bullpen for the season’s final week, and Sabathia made his first regular-season relief appearance Sept. 24. A second planned bullpen outing was scrapped.
Sabathia has had four stints on the injured list due to his chronically hurt right knee.
The Associated Press contributed to this report.