There might be some star players in the NFL who would be jealous of the success a guy like Percy Harvin is having as a rookie. But Adrian Peterson, arguably the NFL's best running back, has been nothing but impressed by the Vikings' first-round pick.

So what stands out the most to Peterson about his new teammate?

"His toughness," Peterson said. "I call him a young hog. I'm from the country and I know how wild boars get after you. That's how he is. He breaks so many tackles, I'm sure he's got tons of yards after the catch. He's just a gift. He's a tremendous athlete. He comes in each week, he works hard and he goes out and plays his heart out." Harvin suffered a shoulder injury in Week 5 but has continued to play. Harvin, who is second on the Vikings with 28 receptions for 369 yards with three touchdowns and has averaged 30.7 yards with two touchdowns on kickoff returns, also has dealt with migraine headaches at various times. Harvin's addition, along with Brett Favre taking over at quarterback, has provided the Vikings with the type of explosiveness they previously lacked on offense.

"I can sit here and say that I always felt confident in the offense, but this year more so," said Peterson, who is tied for second in the NFL with 784 yards rushing. "And that's with the addition of some extra guys. Percy Harvin coming in this year and some guys stepping up and making some big plays. Playing well this year. When you toss Favre in there that speaks for itself.

"I feel like the guys offensively we know that we've got a good offense and we've got guys not only ... it's not [just] about the running game, we've got a balanced offense and we know that we can make plays at anytime and we can score quick. In a second. I feel like if we stay humble, continue to work hard, the sky's the limit."