Vikings rookie running back Dalvin Cook underwent surgery Monday to repair a torn left ACL suffered during an Oct. 1 game.

The procedure was done by noted orthopedic surgeon James Andrews in Gulf Breeze, Fla.

A source had said the surgery went well and there is a “100 percent” chance he will be recovered by the start of next season. Vikings athletic trainer Eric Sugarman concurred.

“No real further damage in his knee, thankfully,” Sugarman said Tuesday. “Pretty straight ACL. And I’d hope to expect him at training camp next year.”

Cook wrote on Twitter, “Thanks for all the prayers and thoughts surgery went great!!! Road to recovery!!!!”

Cook, a second-round draft pick out of Florida State, rushed for 354 yards in the first four games. He suffered the season-ending injury in the third quarter of a 14-7 loss to Detroit. Related Articles Vikings rookie guard Ezra Cleveland active for first time

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ZIMMER TIRES OF EVALUATIONS

Vikings Mike Zimmer offered evaluations Tuesday on several players. His tune changed, though, midway through a response to a question about whether guard Nick Easton had his best game in Monday’s 20-17 win at Chicago.

“I think he’s played pretty good most weeks,’’ Zimmer said. “So, I don’t know if that is the best he’s looked or the medium he’s looked. Quite honestly, I’m not going to evaluate players in the media. I will evaluate the players when they are sitting in this room (without media present). When you ask me, ‘How did so-and-so play?’, I’m not going to evaluate them to the media.’’

Before that, Zimmer had discussed quarterback Case Keenum and running back Jerick McKinnon and said plenty about defensive end Everson Griffen and linebacker Anthony Barr.

On Griffen, Zimmer said in part, “The biggest thing with Everson is he’s relentless in his rush. He believes he can win all the time and probably where he’s grown most of is sticking to the rush plan.’’

On Barr, Zimmer said in part, “I’ve noticed more the last two weeks he’s played with a real fire of trying to get to the ball, rushing, all the different things, physicality, making plays. I think he’s starting to see himself more as a dominant play-making kind of guy.”

RIDLEY STILL IN MIX

Running back Stevan Ridley, released by the Vikings on Monday, will remain in the Twin Cities until at least Wednesday since sources said there is a chance the team could re-sign him.

Ridley was signed last Thursday and took part in three practices. Minnesota let Ridley go in order to restore wide receiver Michael Floyd to the roster after a four-game NFL suspension.

The Vikings have just two running backs on the roster in McKinnon and Latavius Murray, although fullback C.J. Ham also can play the position. They have seven wide receivers, but sources said they are reluctant to waive rookie Rodney Adams or rookie Stacy Coley for fear either could be picked up by another team before being placed on the practice squad.

If Ridley isn’t re-signed by Wednesday, he is expected to return to his home in Natchez, Miss. If that is the case, Minnesota still might have interest in signing him at a later point.

BANGED-UP VIKINGS

Zimmer declined to speculate on injuries suffered Monday by Easton and wide receiver Stefon Diggs.

Easton injured a calf in the fourth quarter and was replaced at left guard by Jeremiah Sirles for Minnesota’s final 10 offensive plays. Diggs suffered a groin injury in the third quarter but was able to return.