Week 6 Start 'Em, Sit 'Em: Brandon Marshall, Rashard Mendenhall and Stars to Sit

It's always fun to find fantasy football stars and sleepers, but not every productive player in the NFL can have a successful week and it's only fair to let the owners of those destined for failure to know ahead of time.

A few good men, including the following four, will find the going tough in Week 6.

Brandon Marshall, WR, Miami Dolphins

Oh boy. Where do I start with Brandon Marshall?

the Let's see...he hasn't sniffed 100 yards receiving in a single game since Week 1 matchup with the Patriots' horrid secondary, he hasn't caught a touchdown since Week 2 against the Texans, Matt Moore is now his quarterback, and he'll be stuck on Revis Island all game.

And, if that weren't enough, Marshall has already made it clear that he's "going to play like a monster," which may or may not get him kicked out of the game.

Anything else?

Rashard Mendenhall, RB, Pittsburgh Steelers

If it weren't for Chris Johnson's subpar season, Rashard Mendenhall might well be the most disappointing running back in all of fantasy football.

Mendenhall is expected to play against Jacksonville after missing Pittsburgh's Week 5 win over Tennessee, but shouldn't be expected to do much.

The Jags run defense is surprisingly stout, ranking in the top 10 in yards, yards per carry and fantasy points per game for opposing running backs.

If Mendenhall couldn't crack the 100-yard plateau when healthy earlier this season, how could he ever hope to do so on a sore hamstring against a strong defense?

Matt Schaub, QB, Houston Texans

Things have gone terribly wrong for Matt Schaub over the last two weeks.

Okay, so maybe throwing for 416 yards and two touchdowns against the Raiders wasn't so bad, but the two picks and low completion percentage (47.1) leaves much to be desired; as did his performance against the Steelers (138 yards, one touchdown).

His beloved Andre Johnson will be out once again with a hamstring injury when the Texans trot into Baltimore to face the Ravens.

Ray Lewis, Ed Reed and the rest of the gang in Charm City have been particularly harsh on opposing quarterbacks this season, allowing just three touchdown passes against six interceptions, along with the fewest fantasy points per game.

Jason Witten, TE, Dallas Cowboys 

Believe it or not, the Patriots have actually done an excellent job against opposing tight ends this season, with the sixth-lowest fantasy points average in the league this season.

Granted, Jason Witten is arguably the best tight end New England has yet seen this season, and the Pats pass rush is terrible, but linebacker Jerod Mayo should be able to put the clamps on Tony Romo's man crush.

If nothing else, Romo will probably be too busy chucking the ball downfield to Dez Bryant and Miles Austin to remember that he has Witten as his security blanket underneath.