Eric Kettani’s football career has been anything but typical: Graduate from Naval Academy, make New England Patriots practice squad, leave Patriots after request for leave from Navy is denied, return to Patriots’ practice squad after being granted an early release from active duty after all, get released by the Patriots, get signed by the Patriots again, then get released again and signed by the Washington Redskins. Now signed to a futures contract with the Redskins, Kettani can participate in offseason practices. After one such practice on Monday, he engaged in another atypical NFL activity — his head coach participated in his…