Ryan Clark explains how bad losses for the Eagles and Bengals in Week 7 have both teams dropping in his power rankings. (0:42)

The Cowboys made waves on Monday, sending a first-round pick to the Raiders for Amari Cooper. Dallas can't afford to be too patient with its new wide receiver while he adjusts to a new offense, as the Cowboys' passing attack ranks among the worst in the league. In a tight division race, the Cowboys need Cooper to produce quickly.

Who else can be those crucial difference-makers? As you sift through the Week 8 NFL Power Rankings, we have a player on all 32 teams who needs to crank it up a few notches to help shore up a weakness.

How we rank the teams: Our power panel -- a group of more than 80 writers, editors and TV personalities -- evaluated how all 32 teams stack up through the first seven weeks of the season.

Previous rankings: 7 | 6 | 5 | 4 | 3 | 2 | Preseason

Record: 7-0

Week 7 ranking: 1

Need more from: P Johnny Hekker. There's not much to gripe about with the Rams' 7-0 start, and they don't punt often -- but when they do, Hekker hasn't been as productive as last year. The Rams are averaging the third-fewest yards per punt this season after averaging the fourth most last year. -- Michael Schwartz

Record: 6-1

Week 7 ranking: 3

Need more from: CB Kendall Fuller. According to NFL Next Gen Stats, Fuller is allowing 9 yards per target when he is the nearest defender, 10th most among cornerbacks who have been targeted at least 30 times. The Chiefs will need his contributions as they are being attacked deep. Opponents have a 9.5 air yards per target average against the Chiefs, the fourth-highest average in the NFL. -- Sopan Shah

Record: 5-2

Week 7 ranking: 2

Need more from: DE Adrian Clayborn. He was held without a sack after the Patriots signed him in the offseason until finally getting on the board Sunday with one against the Bears. New England has recorded a sack on just 3 percent of opponents' pass attempts, the worst rate in the NFL. -- Bryan Larson

Record: 5-1

Week 7 ranking: 4

Need more from: CB Marshon Lattimore. The Saints are 5-1 despite a defense giving up 27.2 points per game (sixth most in the NFL) and a pass defense giving up 294 yards per game through the air (fifth most). The Saints have forced just five turnovers all season, tied for second fewest in the NFL, and Lattimore has no interceptions after picking off five passes last year. -- Schwartz

Record: 5-2

Week 7 ranking: 8

Need more from: DE Melvin Ingram. With the absence of Joey Bosa, Ingram will need to be more of a factor in the Chargers' pass rush. According to ESPN Pass Rush Metrics using NFL Next Gen Stats, the Chargers have won their pass rushes in 2.5 seconds or less on 43 percent of plays, which ranks 26th in the NFL. -- Shah

Record: 4-2-1

Week 7 ranking: 10

Need more from: RB Dalvin Cook. Backup Latavius Murray has scored in back-to-back weeks, but the Vikings still rank 22nd in yards per rush and first downs per rush. Cook has not played since Week 2 with a persistent hamstring injury, and he was averaging only 2.7 yards per rush before he went down. -- Sterling Xie

Record: 4-3

Week 7 ranking: 5

Need more from: RB Alex Collins. The Ravens rank 31st in the league in yards per rush (3.4) this season, and Collins, their starting running back, hasn't been much better, averaging just 3.6 yards per rush. Collins also has lost two fumbles, tied with David Johnson for the most by any running back this year. -- Larson

Record: 3-2-1

Week 7 ranking: 9

Need more from: RB Le'Veon Bell. Hard to step up when you have yet to step into the team facility, but that's what the Steelers need from Bell. Pittsburgh ranks 26th in rushing yards per game (88.7), is tied for 24th in rushing first downs per game (4.8) and is 20th in yards per rush (4.1). -- Larson

Record: 4-2

Week 7 ranking: 13

Need more from: TE Greg Olsen. The Panthers are getting only 27 receiving yards per game from their tight ends, third fewest in the NFL. Of course, Olsen missed three tilts. Now that Olsen is back, Cam Newton needs him to be the reliable target that he has been for much of his career. -- Schwartz

play 1:27 All-Pro CB Peterson asks for trade from Cardinals Ryan Clark and Tim Hasselbeck discuss if the Arizona Cardinals will actually trade Patrick Peterson and how it will impact the locker room.

Record: 3-4

Week 7 ranking: 6

Need more from: CB Jalen Mills. The Eagles cornerback has allowed a league-high 541 yards in coverage as the nearest defender, according to NFL Next Gen Stats. Philadelphia as a whole has given up a league-worst 1,410 yards to wide receivers and eight touchdowns, as compared to just two interceptions. -- Xie

Record: 4-3

Week 7 ranking: 7

Need more from: DE Jordan Willis. Opponents are passing for more than 300 yards per game against the Bengals (30th in NFL), and Cincinnati hasn't been able to get any pressure on opposing quarterbacks, doing so on just 23 percent of dropbacks (also 30th). Willis has yet to record a sack despite playing 236 defensive snaps, and the Bengals rank 27th in sack percentage (5 percent). -- Larson

Record: 3-2-1

Week 7 ranking: 14

Need more from: CB Josh Jackson. The rookie cornerback has allowed 10.6 yards per target as the nearest defender in coverage, the sixth-highest rate among CBs with at least 25 targets. Despite having a bye, the Packers already have allowed 10 touchdowns to wide receivers, more than all but the Falcons, Saints and Buccaneers. -- Xie

Record: 3-3

Week 7 ranking: 12

Need more from: RB Jordan Howard. Howard is averaging only 3.46 yards per rush, which ranks 41st out of 47 qualifying running backs. Bears running backs as a whole rank 30th with 1.45 yards after contact per rush, and Mitchell Trubisky has led the team in rushing in two of the past three games. -- Xie

Record: 4-2

Week 7 ranking: 16

Need more from: WR Josh Doctson. The former first-rounder has not yet developed into the vertical perimeter threat the Redskins had hoped for. Alex Smith currently ranks 27th with a 40.5 completion percentage on passes traveling 15-plus air yards, including 0-for-6 when targeting Doctson on those throws. -- Xie

Record: 3-4

Week 7 ranking: 11

Need more from: QB Blake Bortles. Doug Marrone announced that Bortles will be the starter for Sunday's game against the Eagles, and in order to hold on to his job, Bortles will need to hold on to the football. The Jaguars have committed the second-most turnovers in the league, with 17. Bortles has accounted for 11 of those, which is tied for the most in the NFL. -- Shah

Record: 3-3

Week 7 ranking: 17

Need more from: QB Russell Wilson. Wilson is on pace for the lowest Total QBR of his career, as he is recording just 218 passing yards per game. With the Seahawks ranking seventh in rushing yards per game after being in the bottom 10 last season, now it's time for Wilson to step up for a Seahawks team that ranks fifth worst in passing yards per game, ahead of only the Cowboys, Titans, Cardinals and Bills. -- Schwartz

Record: 4-3

Week 7 ranking: 21

Need more from: WR Will Fuller. The Texans are on a four-game winning streak, but they'll need more out of the members of their WR corps not named DeAndre Hopkins. After completing 11 passes on balls thrown at least 20 yards downfield in the first four games of the season, the Texans have only one such completion in their past three games. -- Shah

Record: 4-3

Week 7 ranking: 15

Need more from: DE Robert Quinn. The Dolphins traded for Quinn in the offseason, but he has only one sack despite playing 284 defensive snaps this year. The Dolphins as a team have just 11 sacks this season, which ranks among the worst totals in the league. -- Larson

Record: 3-4

Week 7 ranking: 19

Need more from: RB Tevin Coleman. With Devonta Freeman out until at least the final few weeks of the season, the Falcons will be leaning on Coleman, who is averaging 3.8 yards per carry -- but does have four touchdowns (two rushing, two receiving) in seven games. -- ESPN