Controversial unnecessary roughness penalty on Josh Wallace in Rams-Cardinals game

The Cardinals pulled off a stunning 18-16 upset of the Rams, and it came down to the last second. Chad Ryland hit six field goals, including a 43-yarder as time expired, and Arizona didn’t score a single touchdown. The Rams had taken a 16-15 lead with 47 seconds left on a Matthew Stafford touchdown to Colby Parkinson, with punter Ethan Evans kicking the extra point after their kicker got hurt. Arizona immediately moved into range after a long catch from Jalen Brooks and a controversial unnecessary roughness penalty on Josh Wallace. The Rams’ defense held the Cardinals to field goals all day, but the offense didn’t get going until the fourth quarter. McVay said “we beat ourselves,” and the Rams are now 2-4 and in trouble. Was that penalty the difference, or did the Rams just not show up until it was too late?