EAGAN, Minn. -- Minnesota Vikings tight end Irv Smith Jr. underwent surgery Wednesday morning to repair a meniscus injury, according to coach Mike Zimmer.
Zimmer did not give a timeline for Smith's return, but acknowledged that the Vikings are preparing for the third-year tight end to miss the entire season.
"We knew it was probably going to be a little while anyway," Zimmer said. "Those are all part of things you have to plan for."
Sources told ESPN's Adam Schefter that Smith is facing a four-to-five month recovery timetable.
Zimmer said Monday that Smith was injured during Minnesota's preseason finale at Kansas City, though it's difficult to discern how and when he sustained injury.