When it comes to player efficiency rating (PER), Daniel Gafford was tied with Beal as the second-best player on the Washington Wizards last season, behind only Kristaps Porzingis. The year before that, he was the 3rd best player, behind Montrezl Harrell and again Kristaps Porzingis. His first year with the Wizards, Gafford was a trade deadline acquisition, but with a small sample size, he was the best player on the team with a monster 25.4 PER.
Since Gafford got to DC he has performed as a top 3 player on the team each and every year on a PER basis.