Through two weeks, the have the NFL's best point differential.While much of that succe s can be attributed to the porous defenses of the and , there's reason to believe Arizona's offense has yet to click on all cylinders.Starting offensive linemen and are returning to action this week and deep Dylan Bundy Jersey threat is just getting back to full health. More importantly, coach Bruce Arians is of rookie , a big-play machine.Johnson isn't the only greenhorn impre sing. Here is 's latest Rookie of the Year watch:1. , quarterback: Why it's called "pa ser rating" instead of "quarterback rating": Mariota took seven sacks and fumbled three times, yet still generated a rating of 96.3 against the . He's leading the league with a 129.9 rating -- just ahead of (128.4), (124.4) and (122.6) -- entering Week 3.2. , cornerback While No. 11 overall pick has yet to play a snap for Brad Brach Jersey the , No. 18 overall pick Peters has the look of a future lockdown cornerback. Through two games, Peters has recorded seven pa s deflections, two interceptions and a touchdown.3. , running back: Abdullah touched the ball just seven times in the ' lo s to the . Play-caller Joe Lombardi has to start calling his number more, as this offense desperately needs his playmaking ability.4. , pa s rusher: Beasley's explosivene s off the edge is no surprise, but he was expected to be a liability against Trey Mancini Jersey the run. That hasn't been the case so far, as Beasley has gotten the better of veteran blockers with his speed and athleticism.5. , running back: There are only a handful of human beings who can at 6-foot-2 and 230 pounds. Jones led the ' new ground 'n' pound attack in Week 2, blowing through the ' for 123 yards and a pair of touchdowns. Against the on Thursday, however, his superlative abilities yielded only pedestrian results. He was held to 38 yards on 11 carries and cost the a touchdown when he out of bounds in the end zone for a touchback.6. , defensive end: Hailed as the steal of the draft by Pro Football Focus, Anderson is playing like Brooks Robinson Jersey a top-10 pick. He's been one of the few bright spots on the , generating six tackles for lo s in his first six NFL quarters.7. , wide receiver: Renowned for his savvy route running, Cooper impre sed with his speed in racking up 109 yards and a touchdown versus the . Per Next Gen Stats, Cooper reached 21.38 mph on his 68-yard touchdown reception, the fourth-fastest time by a wide receiver in Week 2.8. , running back: A high-end NFL athlete, Johnson has recorded the fastest time by a running back this season and launched a 41. Chris Davis Jersey 5-inch vertical leap at the NFL . He's the first player in NFL history to score a touchdown via run, pa s and kick return in his first two games.9. , running back: Yeldon's average of 3.3 yards per carry won't knock anyone's socks off, but he moved the chains on a whopping 28 touches in the Jags' victory over the . Yeldon will keep defenses honest, aiding ' development.10. , running back: A boom-or-bust runner, Gordon became the since LaDainian Tomlinson in 2007 to break off three runs of 20-plus yards in one game.Watch list:, , , , , and