6 Sleepers Who Could Supercharge Your Dynasty Roster in 2025

Finding sleepers in dynasty fantasy football is not easy. The other managers in your league are paying close attention, and almost every relevant name is already rostered. But they can be found, and they can be acquired ... often as an "add-on" to a bigger trade. And if you manage to roster a dynasty sleeper before they break out, the value gain for your team can be game-changing. With that in mind, here are six sleepers who could supercharge your roster in 2025 and beyond.

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Justin Fields, QB, New York Jets

While Justin Fields cracks the top eight rounds in Superflex startup drafts, he's currently going as QB25 overall — and in 1QB leagues, he's falling as far as the 15th round or later. Yes, he lost the starting job in Pittsburgh to Russell Wilson last October ... but that might have been the wrong decision. Prior to his replacement, Fields had led the Steelers to a 4-2 record, sported a 93.9 passer rating and a 5-1 TD-INT ratio, and was the QB7 in fantasy (18.9 points per game). In March, the 26-year-old signed a two-year, $40 million contract with the Jets — pennies for a bona fide starter, but also far more than "backup money." The front office has expressed confidence in Fields as the starter for 2025 and faith that he can follow the Baker Mayfield/Sam Darnold path towards a (delayed) franchise-QB breakout.

But honestly, whether or not Fields is the long-term answer in Florham Park, he is a stud in fantasy for as long as he's on the field. After an admittedly ugly rookie season, Fields has averaged 18.8 fantasy points per game as a starter since 2022. The list of multi-year starters ahead of him: Josh Allen, Jalen Hurts, Lamar Jackson, Joe Burrow, Patrick Mahomes. That's it. He's also improved each year as a passer, posting an increase in completion rate and passer rating all four years and a decrease in interception rate and bad-throw rate all four years. New York completely ignored the quarterback position in the draft, instead adding offensive tackle Armand Membou seventh overall and tight end Mason Taylor 42nd overall. Fields is poised for his best NFL season and quite possibly his best fantasy season to date, which would make him an upper-tier QB1 and could earn him an extended future in the league.

Javonte Williams, RB, Dallas Cowboys

In 2021 rookie drafts, former Tarheel running back Javonte Williams was taken comfortably in the first round, early in the first round in 1QB leagues. He had been the 35th overall pick of the NFL Draft by the Broncos and was arguably my favorite prospect in the class, and he rewarded believers with an RB17 fantasy finish as a rookie. Following that season, he peaked as high as RB2 overall in dynasty community consensus ... and then he suffered an awful, multi-ligament knee injury four weeks into the 2022 season. He was rushed back to action in the fall of 2023 and has not been the same in the two years since, with precipitous drops in his efficiency metrics across the board.

Even still, Williams compiled 99 receptions over the last two years, and his 2.9 career receptions per game is top-15 at the position since 2021 (minimum 20 games). Now in Dallas on a one-year, prove-it deal, Williams sits atop a depth chart consisting of 28-year-old Miles Sanders and fifth-round rookie Jaydon Blue. Still just 25 years old, with a good 20-pound advantage on Blue, Williams should get the first crack at starter opportunity for the Cowboys offense in 2025. In fact, he might be the only back outside the top 40 in startup value (currently RB46) to have a legitimately clear shot at 250+ touches. Should he rediscover a modicum of his pre-injury juice — assuming there's any left — Williams could turn in another RB2 fantasy season as a key cog in Brian Schottenheimer's offense.

Marvin Mims Jr., WR, Denver Broncos

I swear, I'm not a Broncos fan. I am, however, a fan of head coach Sean Payton, OC Joe Lombardi, and QB Bo Nix. And, to some degree, of 2023 second-round receiver Marvin Mims Jr. While Mims has had a discouragingly slow start to his fantasy career, totaling just 61 catches and 880 receiving yards over his first two seasons, he has been a Pro Bowl returner both years and saw a mini-breakout last winter. After averaging 2.2 targets, 1.3 catches, and 10.1 receiving yards per game over the first 12 weeks, with just one touchdown, Mims logged 5.2 targets, 4.6 catches, and 68.2 yards per game in December and January, scoring five touchdowns over the last five games. He was the WR120 in fantasy points per game for the first three months of the season ... and the WR14 over the last. In only his second official "start" of the year in Week 17, Mims caught all eight of his targets for 103 yards and two touchdowns.

Meanwhile, the Broncos did little to address what appeared to be a position of need this offseason: their "biggest" wide receiver additions were free agent Trent Sherfield and third-round draft pick Pat Bryant (a massive reach by most pre-draft grades). That leaves Mims squarely in the WR2 position behind Courtland Sutton, who's not exactly a target-hog number one. With an elite offensive line, an ascending young quarterback, and offensive coaches with a track record of pass-game success, the situation around Mims is primed for a breakout. Should he improve on his late-2024 pace and near or surpass 100 targets in 2025, Mims is an easy bet to crush his current WR63 valuation.

Roschon Johnson, RB, Chicago Bears

There was quite a bit of buzz around the Bears drafting a running back last month — potentially even making a move up for Ashton Jeanty — and they technically did. In the seventh round. Consequently, Roschon Johnson enters the 2025 season as the clear-cut number two to D'Andre Swift ... and it's important to remember who's coaching this team. Just three years ago, in his first year as Lions offensive coordinator, Ben Johnson produced one of the most legendary "Thunder" fantasy seasons in recent memory, when Jamaal Williams racked up 1,066 rushing yards and 17 rushing touchdowns to finish as the RB8 overall. The Lightning to Williams' Thunder that year? D'Andre Swift. Before that season, Williams had never crested 700 rushing yards or five touchdowns (incidentally, Johnson scored six last year). Oh, and in the two years since, former Bears bruiser David Montgomery totaled 25 rushing scores in just 28 games.

Now, I'm not guaranteeing that the Bears are the new Lions (oh my), or that Johnson will score double-digit touchdowns ... but I'm also beginning to believe both are possible. Chicago focused heavily on the offensive line this offseason (a key strength of the Detroit run game), Caleb Williams should take a major step forward at the helm, and the receiving weaponry they've assembled should make it hard for defenses to key in on the run game ... or to keep them out of the red zone. And despite Johnson's general lack of exciting production through two career seasons, consider this: the 225-pound back has scored on eight of 13 rush attempts from inside the five-yard line, for a 61.5% TD rate on those carries ... fifth-best among backs with at least 10 such carries in that span. When Detroit got down inside the five back in 2022, Swift shouldered just 12% of the rush attempts (Williams saw 85%). Johnson is going to have scoring chances in 2025. And he's the RB64 in dynasty consensus value.

Luke Musgrave, TE, Green Bay Packers

Just before the NFL Draft, I published a piece on players to sell in dynasty, and concluded it with Packers tight end Tucker Kraft. Not because I don't think Kraft is talented. But because Luke Musgrave exists. Musgrave missed the majority of the 2024 season, and Kraft had a breakout year in his absence. But it's worth remembering that Musgrave was viewed as the better receiving prospect entering the league, that Green Bay drafted him a full round earlier in 2023 (42nd overall to Kraft's 78th), and that prior to Musgrave's injury towards the end of the year, he was heavily outproducing Kraft in every relevant fantasy metric.

Now, I'm not suggesting you trade Kraft for Musgrave, or take the latter over the former in a startup draft. But currently, Kraft is sitting at TE11 in community consensus value, and Musgrave is all the way down at TE29 (rookies included). If Musgrave can put together a healthy 2025, I see very few worlds in which he doesn't close that gap. And if things shift back towards the way they looked through the first three months of their careers, Musgrave could go from forgotten fantasy sleeper to legitimate TE2 faster than you can say Lambeau Leap. You can acquire the 24-year-old tight end for a piece of string cheese. I'd consider doing it before training camp.

Jalen Tolbert, WR, Dallas Cowboys

In one of the more baffling moves of the draft — or "non-moves" in this case, the Dallas Cowboys completely ignored wide receiver, instead drafting five linemen, a corner, and a couple of running backs. Their biggest move of the offseason at wideout was signing Parris Campbell to a $1.3 million deal ... and no, I'm not exaggerating. That means that, at least for now, Jalen Tolbert is the likely number two to CeeDee Lamb in Dallas, an offense that threw the third-most passes in the league last season, with Dak Prescott missing the second half of the season. During that 2024 campaign, Tolbert caught 49 of 79 targets for 610 yards and an impressive seven touchdowns, including three TDs over the last four games. Also, it's not like Dallas brought in a bell-cow running back to index their offense around (see above), so all signs point to another pass-happy offense in 2025.

So, Tolbert was the WR45 in fantasy last season, little to nothing has changed on the roster, he's getting a proper starting QB back under center (no offense to Cooper Rush), and is still just 26 years old. With all that in mind, it's tough to reconcile why he's currently valued as the WR98 in community consensus and going somewhere around the 20th round of startups. Is he going to break out into fantasy WR2 territory? Almost certainly not. But could he start several weeks in your FLEX spot and offer much-needed depth to your dynasty roster? Absolutely. And those players are crucial in championship runs.