Post Malone is making Madison Square Garden his home for two nights.The 27-year-old rapper, formerly known as Austin Richard Post, will perform at the Mecca of Basketball on Wednesday, Oct. 12 and Thursday, Oct. 13 as part of his ongoing “Twelve Carat Tour.”Malone recently made headlines on the tour after falling in a hole for his guitar stand and subsequently bruising his ribs while performing in St.