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Seahawks assistant offensive line coach Pat Ruel was hospitalized after Sunday’s game at San Diego because of an irregular heartbeat, according to multiple published reports.

According to Terry Blount of ESPN.com, the 63-year-old Ruel is slated to be held overnight at an area hospital for observation.

Ruel has been on the Seahawks’ coaching staff since Pete Carroll became head coach in 2010. He had previous NFL coaching stints with the Giants, Bills, Packers and Lions.

The Seahawks fell 30-21 to the Chargers at Qualcomm Stadium on Sunday.