The Cardinals placed Mack (Achilles) on injured reserve Wednesday, Aaron Wilson of KPRC 2 Houston reports.
Mack tore his left Achilles during practice Tuesday, Dani Sureck of the Cardinals' official site reports.
Mack departed Tuesday's practice due to a left leg injury, Tyler Drake of ArizonaSports.com reports.
The Cardinals signed Mack to a one-year contract Friday, Darren Urban of the team's official site reports.
Mack had a workout with Arizona on Thursday, Howard Balzer of GoPHNX.com reports.
Mack (hamstring) was placed on injured reserve Tuesday, Aric DiLalla of the Broncos' official site reports.
Mack is expected to miss the Broncos' season finale against the Chargers on Sunday, Mike Klis of 9News Denver reports.
Mack suffered a hamstring injury during Sunday's game at Kansas City.
Mack rushed four times for 22 yards in Sunday's 51-14 loss to the Rams.
Mack rushed the ball five times for 37 yards in Sunday's 24-15 win over Arizona. He added four receptions on four targets for 26 yards.