ARLINGTON, Texas – The Dallas Cowboys' success during the regular season could lead to a shakeup on the coaching staff.

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A source told ESPN Insider Adam Schefter that the Oakland Raiders have requested permission to speak with Cowboys passing game coordinator Scott Linehan about their head-coaching vacancy.

Linehan is a free agent of sorts whenever the Cowboys’ season ends. He signed a one-year deal with the team last offseason after a five-year run as the offensive coordinator of the Detroit Lions.

Linehan was the head coach of the St. Louis Rams from 2006-08, posting an 11-25 record. He went 8-8 in his first year but lost 17 of his final 20 games before being fired after four games of the 2008 season.

Linehan has had a huge impact on the Cowboys’ offense. The Cowboys had the second-most points (467) and yards (6,122) in franchise history. DeMarco Murray broke the Cowboys’ single-season mark for rushing yards in a season (1,845) and led the NFL. Dez Bryant caught a franchise-record 16 touchdown passes. Tony Romo led the NFL in passer rating and completion percentage.

Murray, Bryant, tackle Tyron Smith and guard Zack Martin were named All-Pro and were also named to the Pro Bowl along with Romo and center Travis Frederick.