DAL OFFSEASON: Trade & FA | Mavs "mostly done...but you never know."

[Kammrath]

is he a good defender?

The last two seasons Beal has been -5.8 and -10.7 (!) on D (on/off), the worst for his whole team both seasons (!).

He was literally the 3rd worst defender (!) in the whole NBA according to DRPM (-4.79). Only Isaiah Thomas and Trae Young were worst defenders. 

Does that mean he can't be serviceable if in a better situation? No. But do NOT count on him to be anything that helps team D.