J.J. Watt
The Cardinals thought that they pulled off a coup when they signed Watt after he left the Texans. A three-time Defensive Player of the Year, Watt left his heart and soul on the field. But he only played in seven games in 2021 and may have been the difference for the franchise.

Arizona won 11 games but they missed their star defensive end as injuries began to take their toll. This was a major disappointment because they hoped for a deep playoff run. Watt returned and played 16 games the following year again but then he finally retired (via Bleacher Report).