nbadraft.net says this.....Celtics receive a 2018 Grizzlies first-round pick. (Top 12 protected in 2018,Top 8 in 2019, Top 6 in 2020, unprotected in 2021, to be conveyed 2 years after 1st rounder is conveyed to Denver.....which means assuming Denver gets the pick this year we have to wait two more years. I think