Despite generating a season-high 192 yards from scrimmage in the ' Week 2 victory, 's famed fifth-gear was noticeably mi sing on a through open prairie land.After Peterson showed off his trademark power and explosive slashing in a the next week, the only question remaining was whether Quincy Enunwa Jersey he would be able to pull away from defenders for game-breaking runs as he did back in his 2012 MVP season."," Peterson declared after that performance, conceding that his conditioning was suboptimal in September after sitting out the entire preseason schedule.He bolstered that statement with authority on a 48-yard, fourth-down burst that brought the back into the game early in the fourth quarter of Sunday's nail-biting lo s at Denver.Per Next Gen Stats, Peterson reached a season-best speed of 21.89 mph -- the highest of any Week 4 running back -- while streaking past and eliminating the free safety's angle.It's exactly the kind of back-breaking sprint Peterson pulled off in routine fashion three years ago, gashing stacked boxes en route to the greatest 10-game stretch (1,598 rushing) in NFL history.For what it's worth, the NFL's rushing leader has more yards through four games this season (372) than he did after four games in 2012 (332), when he came within eight yards of Eric Dickerson's single-season record.Here's what else we learned from Next Gen Stats in Week 4: rookie arrived on the NFL scene with his best Peterson impre sion, rushing for more yards in the fourth quarter Sunday than any running back has compiled in the fourth quarter of the entire season. Eliminating any doubts that he's fully recovered from ACL Jarrod Wilson Jersey surgery, Gurley also had (four) in the third and fourth quarters as any player has had in all four games combined.Showing a rare power-speed combination that backs not named Peterson could only imagine, Gurley in the fourth quarter, reaching the third-highest speed (20.84 mph) by a running back with the ball in Week 4."He's everything that he was supposed to be, as good as advertised coming into the league," NFL Media analyst Bucky Brooks said on Monday's Sheldrick Redwine Jersey edition of the . "You thought he would lose some of the stuff in terms of his speed, physicality, his toughne s coming off the injury where you'd think you would see a tentative player. Not at all. This guy is a big-time player. A guy who brings all of the skills that you look for at the position. And he's workhorse, he's everything I thought he would be in the National Football League and I'm surprised he was able to catch on so quickly and become that player."Peterson and Gurley weren't the only backs facing questions about their speed entering the season. Coming off knee surgery, had been a flop through nearly 12 full quarters in his return from an August knee scope. Sean Payton had to be feeling better after Spiller reached a speed of 20.80 mph on his 80-yard, game-winning touchdown. isn't the superlative athlete that he was a half-decade ago in his return from ignominy, but the 35-year-old quarterback still recorded the game's top three speeds by a ball carrier -- all above 20.0 Garrett Wilson Jersey mph -- in last Thursday's lo s to the . linebacker has been a draft bust to date because there's no power element in his repertoire. If there's one saving grace to his game, it's that edge rushers simply don't move like he did in tracking down wide receiver at the end of a 68-yard catch-and-run. Mingo reached a top speed of 21.11 mph in pursuit while Inman topped out at 21.04, which allowed the linebacker to catch the wideout despite 10.62 yards of separation at the catch point.The aren't breaking deep threat in slowly after the second-round speedster mi sed Vinny Curry Jersey a month and a half with fractured ribs. Smith played 83 percent of the snaps in his Week 3 debut, covering the most distance from scrimmage among wide receivers. He went on to play more snaps than starter (52 to 46) in Week 4. While that is partially due to Decker's nagging knee injury, the playing time suggests Smith's role will incrementally increase.