Sharrif Floyd's fourth NFL season will end on injured reserve.

The Vikings placed Floyd on injured reserve Monday and promoted defensive tackle Toby Johnson to take his place.

Floyd, the 2013 first-round pick, has not played since Week 1 due to lingering knee problems. Floyd underwent an operation on his left knee Sept. 22, which was acknowledged by head coach Mike Zimmer as needed to repair cartilage issues in the knee. He had been in and out of the team's Winter Park training facilities in recent months to see specialists for his knee.

He's dealt with issues in both knees during his young NFL career. Floyd also needed a midseason surgery in 2015 to remove cartilage from his right knee, which forced him to miss three games.

This spring, the Vikings approach a crossroads with Floyd as he's currently under contract for a pricey fifth-year option, which becomes fully guaranteed in early March.

They'll have to make a decision on his long-term future with the team after Floyd has missed 20 games due to injury across the past three seasons.

He's the latest Vikings starter to land on 2016′s injured reserve, joining quarterback Teddy Bridgewater, running back Adrian Peterson, left tackle Matt Kalil and right tackle Andre Smith.

Johnson, 25, was undrafted last year out of Georgia and made the Vikings practice squad after a solid preseason.

"I can't thank the @vikings organization enough for believing in me. I'm excited to be apart [sic] of something special for the next 3 years," Johnson wrote from his Instagram account.