Sam Gagner has been sent back to Edmonton to get his knee checked out by the Oilers' medical staff.  Although it's apparently possible he'll rejoin the Oilers later on the trip, if the injury isn't serious.  If there's enough of a worry that they want to send him back to get evaluated, I hope they give him at least a few days off.  It would be absolute foolishness to rush him back from a minor (let's cross our fingers) injury given the Oilers' position in the standings.