to answer your question it was 2 games. below is taken from a sportsnet article.
TORONTO –
Matt Murray’s flared-up ankle injury is “going require some time, for sure” to heal up, according to Sheldon Keefe.
The
Toronto Maple Leafs coach did not estimate a recovery timeline for his goaltender’s return but is hopeful Murray will not be sidelined long-term.
Murray underwent testing Sunday and will take time to rest. Expect an update when the Maple Leafs return from their bye week and practice Feb. 9 in Columbus.
After
suddenly pulling out of Friday’s showdown with his former team, the Ottawa Senators, Murray was deemed unable to play due to an aggravated ankle ailment he had quietly been nursing for a while.
based on this article posted on Jan 29th on Sportsnet by Luke Fox Matt had been trying to play through an ankle injury which for a goalie would seem like a pretty tough thing to do. so it's not surprising he struggled in his last few starts. when he returned from this injury he was very poor.