ALAMEDA, Calif. -- Former NFL defensive player of the year Khalil Mack was a no-show at the first day of the Oakland Raiders' voluntary offseason workout program on Monday, a source confirmed, as Mack missed the opportunity to meet new coach Jon Gruden in an official capacity for the first time.
Mack's absence was first reported by the NFL Network.
The workouts, which Gruden said would be heavy on the strength and conditioning side, are voluntary, and Mack is awaiting a contract extension. Mack is entering the final year of his rookie deal and the No.