Deep Fantasy Football Sleepers (2025)

Thankfully, gamers don’t need to construct an entire fantasy football roster from undrafted players in typical re-draft leagues. Still, the following is a thought exercise to highlight intriguing players who are typically undrafted, even in larger formats. The following highlighted players have an average draft position (ADP) of 200 or later in half-point per reception (half PPR) fantasy football formats. Here are some of our favorite deep fantasy football sleepers of 2025.

Fantasy Football Deep Sleepers

Joe Flacco (QB – CLE): 240.0 ADP/QB34

Frankly, gamers shouldn’t be stashing an undrafted quarterback in most leagues. Yet, suppose a gamer who picks a stud quarterback and wisely doesn’t waste a bench spot on a backup quarterback in a 14-team league has the misfortune of their superstar signal-caller suffering a multi-week injury before Week 1, and their league mates have left them with slim pickings after choosing two quarterbacks per team. That was the hypothetical in my mind when choosing an undrafted fantasy quarterback for this piece.

Joe Flacco was a successful gunslinger in Kevin Stefanski’s offense in 2023. He started from Week 13 through Week 17 for the Browns in 2023, averaging 21.8 fantasy points per game. Flacco was the QB3 in points per game in 2023.

Flacco isn’t a lock to win Cleveland’s starting quarterback gig, but he should probably be viewed as the favorite. The 40-year-old quarterback would have a potentially tasty matchup in Week 1 if he won the job. The Browns host the Bengals in the season’s opening week, and I’m skeptical that changing defensive coordinators will cure all that ailed Cincinnati’s pitiful defense. The Bengals also haven’t signed first-round pick Shemar Stewart, and stud pass rusher Trey Hendrickson is in a contract dispute with the organization. Until the Bengals prove themselves to have a competent defense, they’ll be a popular option to stream offensive players against in fantasy football leagues.

Darren Waller (TE – MIA): 229.0 ADP/TE30

Darren Waller’s one-season retirement came to an end, with the Dolphins trading for him to replace Jonnu Smith. Waller’s peak is a distant memory, and he missed six games in 2021, eight in 2022 and five in 2023, but he still played well by tight end standards in his most recent campaign. In 2023, Waller had 4.3 receptions per game and 46 receiving yards per game. Sadly, he scored only one receiving touchdown in Big Blue’s punchless offense.

Still, per the data suite at Fantasy Points, Waller was ninth among 68 tight ends with at least 100 routes in 2023 in expected half PPR points per game (10.4). Moreover, Mike McDaniel leaned heavily on Smith in Miami’s 2024 offense. Waller could be a fantasy asset this year if he has anything left in the tank, and the organization presumably won’t ask him to block much since he initially decided to step away from the NFL when he was essentially used as a fullback for a play against the Bills. Joking aside about Waller’s aversion to blocking, Miami didn’t trade for him for his blocking prowess. He’s an intriguing dart throw at the end of drafts for gamers who waited to take two cracks at a cheaper option at tight end as long as Waller’s ADP doesn’t skyrocket.