Tigers manager Brad Ausmus said Wednesday that Dirks' hamstring injury is minor, Chris Iott of MLive.com reports. While rehabbing from back surgery with Low-A West Michigan, Dirks felt his left hamstring grab Tuesday as he chased down a fly ball. Fortunately, it's a relatively minor setback for Dirks, as he is expected to resume playing soon, with the plan being for him to continue his assignment with Triple-A Toledo.