Unlike his electric preseason debut, Andrew Luck's first pass against the Pittsburgh Steelers didn't result in a touchdown.

His eighth one did. Just not for the Indianapolis Colts.

Standing on the sideline moments after Pittsburgh's Ike Taylor cut in front of an underthrown pass and raced 50 yards for a score, Luck fumed. But only for a second.

Showing the mental toughness the Colts wanted when they tasked him with helping rebuild a franchise on the fly, the rookie rebounded to help Indianapolis take the halftime lead before falling 26-24 on Sunday night. Pittsburgh rookie kicker Danny Hrapmann kicked four second-half field goals, including the 22-yard winner with 23 seconds remaining.

"You never want to throw any interceptions, even if they are tipped, bobbled, whatever," Luck said. "I've got to cut down on those, but I think showing we can bounce back from those mistakes and kind of climb out of that hole was a good sign."