It took two-and-a-half quarters against an undermanned Memphis Grizzlies team for the Knicks to give their organization, fans and head coach an opportunity to exhale. They eventually ran away with a 106-94 win to mark both Tom Thibodeau’s 500th career head-coaching victory and the team’s sixth win in the seven games following the OG Anunoby deal. But it was a stressful night to say the least. The Grizzlies only had eight available players for Saturday’s matchup against the Knicks with an injury list featuring all of their starters and most of their core rotation players. Memphis was without su…