He impressed the higher ups at the summer camp where he shot 44.7% from the floor and scored 13.8 points on average.
The forward spent four years at Gonzaga maturing, and then was undrafted. He told the LA Times awhile back:
"I tried to show what I'm capable of. I'm a guy who is willing to work. I'm not just a guy who is going to sit around and think everything's going to fall into my lap. That's just not me. I hope I get the opportunity and I can reward the guys with playing hard."
His two-year deal is for the minimum amount, but with a "significant" guarantee in 1st year, likely because if he doesn't work out, they'll figure something out to free up cap space for the 2014 free agents they're looking at.
It's actually a little odd that they gave a guy who had no aggressive suitors a two-year deal, but they must see something promising in him.