by Roger Rotter

Fantasy Football

John Juhasz analyzes the fantasy impact of Ronnie Brown's season-ending foot injury and Larry Johnson's signing by Cincinnati. Who are this week's top 10 fantasy studs and duds? Who are the top 10 waiver claims or the top 10 sleepers? Or who are this week's top 300 fantasy players? Roger Rotter answers. Have a fantasy football question? Ask our experts on Tuesdays and Thursdays at 3 p.m. ET! Roger Rotter also chats on Sundays from 11-1 p.m. ET!

Also, find out possible substitutions for fantasy starters who have a Week 8 bye.

These include quarterbacks Tom Brady, Carson Palmer and Ben Roethlisberger; running backs Cedric Benson, Rashard Mendenhall and Clinton Portis; wide receivers Randy Moss, Wes Welker, Chad Ochocinco, Dwayne Bowe, Hines Ward, Santonio Holmes and Santana Moss; tight ends Heath Miller and Kellen Winslow; and D/STs Pittsburgh and New England.

Review my top 10 waiver claims:

10. Marc Bulger, QB, St. Louis

Detroit rates as the NFL's third-worst passing defense and has yielded the second-most passing scores (17). Bulger has struggled this season but fantasy reserve Jason Campbell had his best fantasy day against Detroit. He threw for 340 yards and two scores against the Lions in Week 3.

9. Marcedes Lewis, TE, Jacksonville

Cooley is expected to be out indefinitely after breaking his right ankle and hopes to return in four weeks. Washington is on a bye, so owners who need a pickup at tight end for this week can look at Lewis. He caught four passes for 76 yards and a score in the Week 3 meeting against Tennessee, and faces the Titans again in Week 8.

8. Andre' Davis, WR, Houston

If Andre Johnson misses any games with a lung contusion, then Davis would likely be the best candidate to replace him. He owns the receiving skills and big-play ability to help compensate for the loss of Johnson, and would be most likely to post a solid fantasy day. Davis has already shown he can post a big game when Johnson is injured. In 2007, when Johnson missed seven games (Weeks 3-9) with a knee injury, Davis caught five passes for 117 yards and one touchdown in Week 4.

7. David Garrard, QB, Jacksonville

Garrard generated his best fantasy game of the season against Tennessee in Week 4, passing for 323 yards and three touchdowns. Tennessee still ranks as the worst passing defense (310.7) and has allowed the most passing scores (19).

6. Arizona D/ST

The Cardinals are looking to repeat their fantastic defensive effort against Carolina in the playoffs last year. Jake Delhomme threw five interceptions and lost a fumble, resulting into six turnovers. He was also sacked twice.

Delhomme has continued to struggle this season, leading the NFL in interceptions with 13. The Panthers' offense scored only seven points, allowed two sacks and permitted four turnovers (three interceptions, one fumble) against Buffalo last contest. Arizona also acquired three sacks and forced four turnovers (three interceptions, one fumble) on the road against the New York Giants last contest.

5. San Diego D/ST

The Chargers' fantasy D/ST dominated Kansas City last game. San Diego allowed only seven points, acquired four sacks, forced three interceptions and scored from a blocked punt return against the Chiefs.

San Diego will be aiming for another excellent fantasy outing Sunday against Oakland's shaky offense. The Raiders were scoreless, permitted three sacks and allowed four turnovers (two interceptions, two fumbles) vs. the New York Jets last contest.

4. Jamaal Charles, RB, Kansas City

If Larry Johnson misses any games with his recent off-the-field conduct, his backup Charles will likely be Kansas City's featured running back. Of note, Charles has been more effective when he plays. He's averaging 5.0 yards per carry compared to Johnson's lowly 2.7 yards. He's also had more receiving yards with 14 catches for 120 yards and an 8.6 average compared to Johnson's 12 receptions for 76 yards and a 6.3 average.

3. Shonn Greene, RB, New York Jets

Jets backup running back Leon Washington is out for the season, leaving Greene to handle his duties. He's also expected to be the receiving back, a role that was fulfilled by Washington. Greene responded superbly in replacing Washington by rushing for 144 yards and two scores against Oakland.

2. Michael Crabtree, WR, San Francisco

He stepped in quickly in his first action as a pro, catching five passes for 56 yards. He will be helped by Alex Smith returning as the starter at quarterback. Various reports indicate that Smith is considered a better intermediate and deep passer than Shaun Hill. This bodes well for Crabtree's yardage and scoring potential. Of note, Crabtree caught three passes for 34 yards from Smith last game.

1. Chris Wells, RB, Arizona

Tim Hightower may be the starter, but based upon the stats, Wells has become Arizona's featured back.

The rookie first-rounder received 14 carries, while Hightower had only four handoffs against the Giants. Additionally, Wells averaged a more robust 4.8 yards compared to Hightower's lowly 2.3 average that game. Wells finished with 67 yards and a score, while Hightower ran for only nine yards with a score. Wells was also able to handle some of the receiving duties from the backfield, catching three passes for 10 yards.