Veteran point guard Kemba Walker will likely be away from the Pistons as they start their training camp this week, sources told Shams Charania and James Edwards III of The Athletic (Twitter link). It’s unclear whether Walker is expected to miss the entire camp or only a portion of it. As Charania and Edwards note, Detroit must waive or trade a player by Oct. 17 to be at the league limit for standard roster spots entering the regular season. That player doesn’t have to be Walker, of course, but at this stage in his career, it would make sense for…