Mike Zimmer may not be on the sidelines Thursday.
The Vikings coach will have emergency eye surgery on Wednesday night, the team announced, and his status for Thursday night's game is uncertain.
"Mike Zimmer is having emergency eye surgery tonight," general manager Rick Spielman said in a statement. "His status for coaching tomorrow's game is uncertain. I have met with the coaches and players and we have a contingency plan in place if Mike is unable to coach against Dallas."
Earlier this month, Zimmer underwent a minor medical procedure for a torn retina in his right eye after the coach said he scratched his eye during a Monday night loss to the Bears.