The most comprehensive set of weekly power rankings anywhere on the web now moves to the rookies, as we look at our top offensive and defensive first-year players.

Offensive Rookie Power Rankings

1. Sammy Watkins, Buffalo Bills

Sammy Watkins leads all rookies in receiving yards despite having played one less game than some of his fellow competitors. Watkins has taken over the No. 1 receiver duties in Buffalo, and his game has stepped up with quarterback Kyle Orton. Watkins has been worth the compensation that Buffalo had to give up to select him in this May’s draft.

2. Kelvin Benjamin, Carolina Panthers

Kelvin Benjamin had a tough game against the Saints, as he caught just two passes for 18 yards. He’s had his issues with drops this season but he’s clearly the Panthers’ best option at wide receiver and he’s been worth the selection.

3. Allen Robinson, Jacksonville Jaguars

Robinson is tied for the lead in receptions among all rookies and is third in receiving yards despite playing on a team with a significant lack of talent. Robinson might be the most refined receiver among the rookies as he has better than average hands and speed and runs solid routes.

Defensive Rookie Power Rankings

1. Aaron Donald, St. Louis Rams

Aaron Donald has transformed the Rams defensive line and has become a dominant force at defensive tackle. Donald has sacks in two of his last three games and the Rams have won every game that he’s had a sack in.

2. Kyle Fuller, Chicago Bears

Fuller has been battling injuries but he’s been an elite player at his position. Fuller leads all rookies in interceptions and is tied for the league lead in passes defensed.

3. Anthony Barr, Minnesota Vikings

Barr leads all rookies with four sacks and is turning into one of the biggest playmakers on the Vikings defense. Barr is the only rookie defender to record a touchdown this season.