It's Andy Larsen, he's an Exum hater, and apparently he hates Bradley as well. Bradley put in some good minutes in against the Bucks then immediately fell out of the rotation when Davis returned the next game. Davis came straight back into the rotation from injury, but hasn't played well, and apart from a brief benching against Charlotte has been getting 10-12 minutes every night.
I can't see why from the stats. In his 12 games since returning to the line-up, Davis has played 137 minutes, shot 7-18 (39%) from the field (even though his average shot distance is only 4 feet), 2-5 from the stripe, and been held scoreless 7 times. He has almost as many TOs (6) as FGs. His main positive is his rebounding at a rate of 12.3/36 mins.
How does that compare with Bradley's performance when Davis was out? He played 125 minutes over 9 games, shot 23-37 (62%) from the field and 7-11 from the line, and was held scoreless only once (although that was in only 7 minutes of PT). He only commited 6 TOs in these games too. His rebounding rate was 13.3/36 mins, even better than Davis.
Now I concede +/- is a dodgy stat, but Davis' D is supposed to be superior, so you'd expect over a number of games that Davis would have a better +/-, right? Nope. In Bradley's 9 games, 5 times he was a -1 or better, and only twice was he a double-digit negative. In Davis' 12 most recent games, he has been a -1 or better only 4 times, and a double-digit negative 6 times. So half the time, Bradley was a -1 at worst, but half the time Davis is a -10 or worse - quite a feat in only 12 minutes/game!
But Quin won't play Bradley, and Larsen plays along by relegating him to 11th man status. He can say 'Exum looked bad during warm-ups' but can't say 'Bradley has looked better than Davis during games'.