Tatar was a healthy scratch for Saturday's game against Toronto, Stu Cowan of the Montreal Gazette reports.
It wasn't an undisclosed injury that got Tatar, rather it was a coach's decision. He had been dropped from the top line to the third line Thursday before Saturday's surprising scratch. Corey Perry took his spot on the active roster, while Artturi Lehkonen moved up to the third line. After the game, head coach Claude Julien said he wants to see more from Tatar, who has eight points (4-4) and is an even plus-minus over 14 games. Per Cowan, the coach cited details where the veteran needs to improve, including not losing the puck and getting the puck out of his own zone. Montreal has an extended break and won't play until next Saturday's home game against Toronto, so Tatar will have plenty of practice sessions to earn back his spot.