For one possession their last possession the Cardinals offense finally did all of the things it couldn’t for much of Sunday afternoon against the Lions. They converted on third downs. They made big plays. And they scored a touchdown with less than two minutes left. That 1-yard scoring run by Rashard Mendenhall gave the Cardinals a 25-21 victory in their home opener at University of Phoenix Stadium. The Cardinals failed to convert on their first 8 third down opportunities and were 1 for 11 at one point. But on third down from their 32 receiver Andre Roberts drew a pass interference call in the end zone setting up Mendenhall’s touchdown. The Cardinals’ work wasn’t done because the Lions had one last possession taking over at their 20 with 1:59 and two timeouts remaining. The Cardinals held. The Lions (1-1) got one first down but no more. Rookie Tyrann Mathieu made a key stop on fourth down and the Cardinals (1-1) celebrated their first victory of the Bruce Arians era. The Cardinals trailed 14-10 at halftime but had a chance to take the lead early in the third quarter after end Calais Campbell recovered a fumble at the Lions 7. But they went backwards thanks to a penalty and had to settle for a 23-yard field goal.