Sometimes, star players like Roddy White and Arian Foster and Philip Rivers need to sit on your bench because of bad matchups for one week.
Other times, star players just have a down year. This is especially true for wide receivers.
Wide receivers rely so much on their quarterbacks that when a guy like Peyton Manning goes down, Reggie Wayne loses most of his fantasy value.
So, knowing when to start and when to sit your star players is an important part of fantasy football.
Let's take a look at three star receivers who should be benched in Week 6.
Roddy White, Atlanta Falcons
White has been disappointing all year long, just like the rest of the Falcons offense.
He only has two touchdown catches on the season, which isn't good enough for a top-tier fantasy option.
He also only has one game with 100-plus yards. He's been in a slump all year, and it won't get any easier with Julio Jones out this week.
Against an improving Panthers defense, don't expect him to produce the way he was projected to at the start of the year.
Santana Moss, Washington Redskins
Moss wasn't good last year with Donovan McNabb throwing him the ball. And, now that the 'Skins have found some consistency with Rex Grossman at QB, Moss still isn't a viable fantasy option.
He hasn't had a 100-plus receiving yards game all year. His high so far has been 76 yards in Week 1 against the depleted Giants secondary.
Don't expect things to get much better this weekend. The Eagles are in town and Moss will have to try to get open against the likes of Nnamdi Asomugha, Dominique Rodgers-Cromartie and Asante Samuel.
If he had more than 50 yards this week, I'd be surprised. It's probably best to stick him on your bench for Week 6.
Percy Harvin, Minnesota Vikings
The Donovan McNabb experiment hasn't worked out for the Vikings so far, as evidenced by their repeatedly blowing leads in the second half en route to a 1-4 record.
McNabb's ineptitude has really affected Harvin so far this year. Take a look at his stat line so far this year: 18 catches, 183 yards, no touchdowns.
That's horrible for a guy with Harvin's skill set.
And, with a date against the tough Bears defense on Sunday night, he probably won't notch his first 100-yard game or score his first touchdown this week.
He's not only not a decent fantasy option this week, he's probably not going to be a viable fantasy option for the rest of the year.