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Arkansas tight end Jack Kraus (87) works to keep LSU linebacker Arden Key (49) at bay in the second half of LSU's 33-10 win over Arkansas, Saturday, November 11, 2017, at LSU's Tiger Stadium in Baton Rouge, La.

Three defensive starters were missing from LSU's practice Monday, including edge rusher Arden Key. 

Linebacker Donnie Alexander and cornerback Greedy Williams were also absent during the media's limited viewing window into drills.

LSU coach Ed Orgeron announced earlier Monday that Key was "questionable" this week. The All-American junior suffered what appeared to be a knee injury in the first quarter of the win over Arkansas, but he returned for the next two quarters. He did not finish the game, exiting with LSU up big with 10 minutes, 32 seconds left.

Trainers tended to and iced his knee on the sideline. The severity of the injury is unknown. After the game Saturday, Orgeron said "he should be fine."

Alexander also suffered some kind of injury in the second quarter of the 33-10 win over the Razorbacks. Trainers examined his right shoulder or neck. He returned to the game. Alexander underwent shoulder surgery this spring to repair a torn rotator cuff.

Williams' absence is unclear, but he spoke to reporters after the game, appearing healthy. 

No. 21 LSU (7-3, 4-2 SEC) travels to play Tennessee (4-5, 1-5) on Saturday night. 

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Other practice observations

  • Left tackle KJ Malone missed another day of practice as he recovers from a knee injury he suffered at Florida. Malone has not practiced or played since that game and he was listed by Orgeron on Monday as "very questionable" for this week's game. Malone was spotted on crutches a week after the injury, but he was off the crutches last week while walking the sideline of the win over Arkansas. 
  • Freshman receiver Mannie Netherly missed another day of practice. He's been absent for the last week or so for undisclosed reasons. DE Deondre Clark also did not practice. He was not spotted during drills last week and did not dress out for the game against Arkansas. 
  • QB Danny Etling practiced with his left knee wrapped. Orgeron said Etling played hurt against Arkansas, and the quarterback admitted Monday that he's hurting in several places. He declined to reveal anymore details. 

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Follow Ross Dellenger on Twitter, @RossDellenger.