"The undisclosed operation that Triple H underwent this week was to repair a torn muscle tendon in his arm. Though he had been plagued recently by issues with both surgically-repaired quads and his neck, this is a new injury that may have been suffered while filming one of his two upcoming WWE Films. His planned SummerSlam return bout against Sheamus is likely out the window now as he is expected out for several months.

Triple H was last seen on television being put out of action by Sheamus at the “Extreme Rules” pay-per-view in April where he lost a hellacious streetfight to the Celtic Warrior."

~from http://www.sescoops.com

so sad :( i wish him the best and a speedy recovery. hope to see him back in the ring soon...