Vikings defensive tackle Tom Johnson has no doubt he’ll be at full strength for spring drills.

Johnson tore his right hamstring Dec. 18 against Indianapolis and was placed on injured reserve, keeping him out of the final two games of the season. He said Wednesday the injury has a five- to six-week recovery time and confirmed he won’t need surgery.

“I didn’t tear the tendon,” Johnson said. “I just tore the muscle belly in the hamstring a little bit. It’s nothing crazy. It’s nothing that will bother me long. I’m walking well, I’m moving around. I just can’t accelerate, so there was no real reason to try to do anything to tear it even worse.”

The Vikings’ season ends Sunday against Chicago at U.S. Bank Stadium. Johnson said he will stay in Minnesota a few weeks after that to rehab and make sure he’s “right to rock and roll into the offseason.”

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Vikings cornerbacks Mike Hughes, Cameron Dantzler both miss practice Johnson, finishing the second year of a three-year, $7 million contract, was hurt while blocking Colts center Jonotthan Harrison. He called it a “freak” injury.

“We had a blitz call,” Johnson said. “They slid the protection my way and as I engaged (Harrison), (Colts quarterback Andrew) Luck stepped up and and I jumped up and I fell on one foot, and (Harrison) pushed me just at the right time with all my weight on it.”

Johnson was replaced on the active roster by Toby Johnson, an undrafted defensive tackle in his second season who spent most the season on Minnesota’s practice squad. He played in his first NFL regular-season game in last week’s 38-25 loss at Green Bay, getting in for 10 plays.

“I think I played pretty good,” said Toby Johnson. “The coaches felt like I went in and did my job.”

The 315-pound Toby Johnson was a nose tackle before being pressed into three-technique defensive tackle duty following injuries at the position to Sharrif Floyd and Tom Johnson. He said he expects Vikings coaches to tell him after Sunday’s finale what they want him to focus on during the offseason.

“I’ll see if they want me to play nose tackle or three-technique,” Toby Johnson said. “I’ll see what weight they want me to come in at (in the spring). I might be a little heavy in my mind for three-technique. They’re usually in the 300- to 305-pound range. But I definitely want to improve my body in the mid area.”

Also Wednesday, a source said the Vikings don’t have any significant concerns about rookie cornerback Mackensie Alexander, put on injured reserve last week with an abdomen injury, and he should be ready for spring drills.