Team mini-camps are typically for free agents who haven’t really proven themselves in the NBA yet. There are exceptions, of course. But generally, if you’ve been in the league for a while, having to participate in a free agent mini-camp isn’t a positive sign. Here’s Michigan Live reporting on the Pistons and Derrick Williams:

Derrick Williams participates in Pistons mini-camp

Seven years after being the second overall selection in the NBA draft, Derrick Williams participated this week in Detroit Pistons free-agent mini-camp, trying to work his way back into the league.

He worked out with 17 others at the Pistons practice facility, most with no NBA experience, several who played for the G League Grand Rapids Drive this past season.

It might have humbling for the 2010-11 Pac 10 player of the year at Arizona, a someone who the Minnesota Timberwolves took one pick after Kyrie Irving, ahead of players such as Klay Thompson, Kawhi Leonard, Jimmy Butler, Kemba Walker and Isaiah Thomas.

But it’s part of the process that Williams hopes will lead to a free-agent contract or at least a training camp tryout with a team.

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