Gruden amazed by Mack's continued dominance with Bears

Before his Oakland Raiders took the field for Sunday's game against the Cleveland Browns, head coach Jon Gruden checked in on a former player.

"Damn - Khalil Mack had another strip sack? Are you ... kidding me?" Gruden said as he scrolled through his phone, according to NFL.com's Michael Silver.

That's right. During the early-game window, Mack recorded a strip sack for the fourth consecutive game, his fourth as a member of the Chicago Bears.

After being unable to agree on a contract extension before the season started, Gruden and the Raiders traded Mack to the Bears.

Oakland has since struggled to rush the passer. The team is dead last in the league in sacks with five in four games. Meanwhile, Mack has five sacks - four of which caused a fumble - and a pick-6.