15 Fantasy Football Sleepers, Ranked

Listing fantasy football sleepers this late in the summer isn't easy as most prior sleepers in the offseason have lost their "sleeper" tag due to strong offseason practices, training camps and preseason games. However, that doesn't mean there are ZERO players left who could make some sort of impact if you pick them in the late rounds, or at least keep an eye on them as they sit on the waiver wire.

Below are 15 ranked players who could be worth a look as either a draft pick, or as a player to pick up off waivers if your league has already drafted.

1. Ravens QB Joe Flacco

Flacco might not be considered a true fantasy football sleeper, but I predict he'll outperform his numbers from 2013 now that he has OC Gary Kubiak calling the shots. The team added WR Steve Smith and TE Owen Daniels to the passing game, and Pitta is back healthy after missing 12 games last year. With the belief that Flacco has undergone a "technical and fundamental transformation" in his passing, this could be the year Flacco finally surpasses 4,000 passing yards. He's also sure to rebound from his 22 interceptions from a year ago. Flacco could make for a very strong QB2, with some QB1 upside depending on the matchup.

2. Panthers RB Jonathan Stewart

An early hamstring injury pushed Stewart out of drafts for good because of "scared owner" syndrome. Now healthy and having rushed for 2 touchdowns against the Chiefs Sunday night, Stewart should get his mojo back. That is if he can stay healthy all year. With an offense that lacks strong passing weapons, Stewart will outplay his current ADP of the 17th round. He's also gone undrafted, so he'll make for an excellent pickup if your waiver system is currently open.

3. Steelers RB LeGarrette Blount

The Steelers backfield is a perfect example of why you should avoid drafting until as late as possible. Listed as co-starters, it appears the Steelers wants Blount more involved in the running game than initially thought. This has been pushing RB Le'Veon Bell's value down into the second round after he was ranked as a top 6-7 RB1. Bell himself has even revealed that Blount will likely get the goal-line work this year. If the team does more than that and makes this a committee, Blount's value is much higher than his current 16th round ADP spot.

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4. Eagles WR Jordan Matthews

After a dud of a performance in his preseason debut, Matthews caught all 9 of his targets for 104 yards against the Patriots. The one thing that I love about Matthews is his fearlessness on the field. Pegged as the starting slot receiver, Matthews could come close to leading the team in receptions. He's clearly developing quick chemistry with QB Nick Foles.

5. Jaguars WR Marquise Lee

Outside of RB Toby Gerhart, Lee is another one of the few bright spots on a pitiful Jaguars offense. Like Matthews, Lee performed much better than his preseason debut as he caught all 4 targets for 27 yards and a score against the Bears. With WR Cecil Shorts' continued injury history, Lee could be a sleeper not only in fantasy football, but also for Offensive Rookie of the Year. The Jags are THAT depleted on offense. And you know they are going to be passing a lot in come from behind games. Don't be shocked if Lee leads the team in yards in 2014.