Mike Harris calls fellow Vikings offensive lineman T.J. Clemmings a draft-day steal.

That is becoming apparent midway through the right tackle’s rookie season. Projected by many as a late first-round pick, Clemmings dropped to the fourth round because of concerns over a possible foot injury, and that’s where Minnesota snagged him.

The former University of Pittsburgh star has had no foot issues this season, starting all seven games for the Vikings. Coach Mike Zimmer said Clemmings has shown great improvement in the running game, an area in which he initially had some problems.

“Last week was his best week,” Zimmer said of the Vikings’ 23-20 victory over the Bears in Chicago. “I thought he did better in all areas, really. He blocked better, he was more physical, he sustained better in his run blocks and also in his pass protection, so hopefully that will continue.”

With Clemmings helping lead the way, Adrian Peterson carried 20 times for 103 yards against the Bears. According to Pro Football Reference, Peterson was at his best running behind the right tackle, carrying five times for 40 yards.

The week before, Peterson ran 19 times for 98 yards at Detroit, including five carries for 96 yards over right tackle. That included a 75-yard jaunt.

While line play is a team effort, Clemmings has come a long way in the running game. Pro Football Reference had Peterson rushing three times for five yards over right tackle in the first game against the Lions on Sept. 20 and four times for eight yards at Denver on Oct. 4.

“There were some things that (offensive line coach Jeff Davidson) wanted me to work on, and I think we’re starting to see the results,” said Clemmings, who took over as starter when Phil Loadholt was lost for the season in August because of a torn Achilles. “So I’m building on that. Sometimes you can overthink, and that can slow you down. I think at the beginning I was a little hesitant in the running game.”

Clemmings has had some issues in pass protection, as well, but he generally has been solid in that area. Put it all together and Harris, the starting right guard, raved about his teammate’s recent play.

“I think before he had some technique problems or some footwork (issues), but he’s corrected them and he’s playing a lot more aggressive and a lot more smarter,” Harris said. “He’s become a student of the game. Every week we watch a lot of film together, and the kid is growing up each week. He’s doing a great job subbing for Phil.”

Follow Chris Tomasson at twitter.com/christomasson.