Ruff, who was also assessed a gross misconduct, was irate with on-ice officials for what he perceived were two missed calls late in the game.
"(Rangers forward Sean) Avery jumped on the ice, and they weren't off the ice, and he handled the puck, which put him in a too many men on the ice type of situation," Ruff said Saturday after practice. "And I felt there was an off-side late (that also wasn't called). I just reacted poorly to it.
"I'm not happy with myself, with what happened there," Ruff added. "Emotions run a little high, it was what it was but that's over. . . . I didn't handle it very well."
The Sabres have a 2-0 lead in the best-of-seven series. Game 3 will be played Sunday in New York.