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GLENDALE, Ariz. — Arizona Cardinals running back Marlon Mack is out for the season after suffering a left Achilles tendon injury during Tuesday's practice. Cardinals coach Jonathan Gannon confirmed the extent of the injury on Wednesday. The 27-year-old Mack was signed earlier this week in the hopes the veteran could add some depth in the backfield behind starter James Conner. Mack ran for a career-high 1,091 yards and eight touchdowns with the Indianapolis Colts in 2019, but his career has been derailed since that point because of injuries.







