Shorts got the diagnosis Saturday, one day after feeling tightness in his hamstring during the team's first training camp practice.
Shorts, who has a history of injuries, says he ''can't catch a break right now. My frustration level might be at an all-time high.''
The fourth-year pro missed most of organized team activities with a calf injury and hasn't made it through a full season since college. He missed six games with a hamstring injury in 2011, missed two games because of a concussion in 2012 and sat out the final three games in 2013 with a groin injury that slowed him all season.
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