Timberwolves forward Derrick Williams reported to Target Center on Friday for the start of his second NBA season and his first summer-league minicamp 15 pounds slimmer than when he left in April.

He played his rookie season at 248 pounds and now is 233 after two months spent running the beach, lifting weights, changing his diet and working out two to three times a day back home in Los Angeles.

"He's not the chubby one anymore," teammate Wes Johnson said with a smile.

Williams changed his body in an effort to play small forward this season at the same time his team is throwing $46.5 million at Portland restricted free agent Nicolas Batum, who plays that same position.

Williams just laughed when asked about that juxtaposition.

"He's a great player, man," he said. "I've seen him play before, this season, even before I got to the NBA. It's really not about a hammer [over his head] or anything like that. It's just about me getting better. If I played a little better last season, maybe we wouldn't be having this talk right now."

Williams played almost exclusively at power forward -- backing up two-time All-Star Kevin Love there when everyone was healthy -- during an uneven rookie season, particularly for one selected No. 2 overall last summer.

"I know I can play a lot better than I did," Williams said. "In some parts of last season, I thought I had some good games. I just need to be more consistent. I had a couple games against the Clippers where I had 27 [points] and eight [rebounds] and the next game I'd have six and three."