I'm not going to recommend you putting a ton of faith in the Grizzlies pulling off a fifth seeding in the playoffs, but here is some the math relevant to that slim possibility. The Grizzlies would not be able to lose more than 2 games, and the table below will show you the best possible record that the other four teams could finish with for Memphis to sneak into the #5 slot.
Requirements for Memphis Grizzlies making 5th seed in the West
|Grizzlies Final Record||Memphis' required record||Mavericks' max record||Phoenix max record||
Portland max record
|Golden State max record|
|51-31||7-0 finish||6-1 finish||7-0 finish||2-4 finish||4-3 finish|
|50-32||6-1 finish||5-2 finish||6-1 finish||1-5 finish||3-4 finish|
|49-32||5-2 finish||4-3 finish||5-2 finish||0-6 finish||2-5 finish|