King looked slightly better on D today (with a block and a charge taken, for instance) but still looks sloppy at best. He's guarding an inside man, and whenever a player drives inside, he moves to double him. The driving player passes to the now open big man who King shouldve been guarding for an easy 2. This happens repeatedly.
Similarly, inside passes to big men getting by king are not uncommon. He needs to work on that. Thus the +/-.
Incidentally, D-McClure, while i love his gritty defense, has got to pull more weight on the offensive end. Its getting annoying to see a 0 down for points every game on his end.