Can PC use improvised weapon rules to emulate weapon in a monster statblock? e.g. if PC uses treetrunk as Ogre Greatclub?

@ktkenshinxCan PC use improvised weapon rules to emulate weapon in a monster statblock? e.g. if PC uses treetrunk as Ogre Greatclub? I would allow it if the object was an appropriate size for the PC to wield. Otherwise, it's an unwieldy 1d4 weapon.

— Jeremy Crawford (@JeremyECrawford) October 21, 2014

@ktkenshinx as a DM, I'd rule it on a case-by-case basis. Especially with weapons for Large+ creatures, they aren't meant for PCs

— Mike Mearls (@mikemearls) October 17, 2014