Fantasy football can be a cruel game.
A single injury or string of poor performances by a key member of your team can kill an entire season and ruin an entire summer of research and preparation for even the most well-informed fantasy enthusiast.
Most fantasy owners spend the vast majority of their time identifying players they'd like to draft, rather than singling out guys they'd rather not, which can be a fatal error in many cases.
Due to injury, age or a track record of inconsistency, here are a few big-name players you can't trust and should steer clear of when your draft rolls around this fall.
Remember when Kevin Kolb was a star-in-waiting in Philadelphia a couple of years ago? Well, unfortunately, it isn't 2010, and Kolb is a quarterback of the present, not future.
Since being dealt to Arizona in 2011, Kolb has struggled to materialize into the franchise quarterback so many analysts were sure he'd become.
Due to both a concussion and a foot injury, Kolb only played in nine games in 2011, which should be a red flag for fantasy owners.
It may seem crazy that Michael Turner, who has led the NFL in touches for the last four seasons, is on this list, but as Bob Dylan would say, the times they are-a changin' in Atlanta.
Yesterday, ESPN reported that Turner may be facing a significantly "diminished role" with the Falcons this season.
At age 30, Turner might have a productive year or two left in him, but that won't matter much to fantasy owners if the Falcons do indeed opt to go with a more pass-heavy offense.
He's far from worthless, but he may not be the top-flight fantasy back he's been for the last few years.
Yes, Reggie Wayne posted a 960-yard season in 2011 without Peyton Manning behind center, but at age 33, the five-time Pro Bowler's best days are likely behind him.
Having a rookie quarterback with one of the worst offensive lines in the league in front of him won't help, and Wayne shouldn't be viewed as the high-end fantasy WR he once was.
Though he's a fantasy football legend for his magical 2007 season, Moss has a grand total of five touchdowns in the last two years, which should be a red flag for owners.
Granted, that's because Moss didn't play at all last season, but his performance in 2010 wasn't exactly inspiring (five touchdowns with three different teams), and at 35 years old, there's no guaranteeing he can stay healthy all year.