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New users can take advantage of the top NFL DFS promotions and boosts from sites like Underdog Fantasy, Sleeper, DraftKings Pick6, Boom, ParlayPlay, Dabble and Playsqor on Sunday, Feb. 8 when the Big Game unfolds. The action begins at 6:30 p.m. ET as the Seattle Seahawks and New England Patriots meet with the title on the line. Big names like Drake Maye, Jaxon Smith-Njigba and Sam Darnold are among the options for NFL prop picks throughout the day, while under-the-radar options include AJ Barner, Rashid Shaheed and TreVeyon Henderson. Here's a look at some of the top NFL promo codes for parlay sites like Underdog FantasySleeper and ParlayPlay on Sunday:

Promos for Underdog Fantasy, Betr, Boom, ParlayPlay, Sleeper, Pick6, Dabble, Playsqor

Here's a look at the promo codes being offered by best DFS apps like Underdog Fantasy, Sleeper and ParlayPlay.

SiteBonus Offer  Promo Code
Underdog FantasyPlay $5, Get $75CBSPORTS2
Sleeper100% deposit match up to $100CBSSPORTS
ParlayPlay100% deposit match up to $100 + a $5 entry ticketCBSSPORTS
Boom Fantasy$100 first entry refundJust click here
DraftKings Pick6New players play $5 on first paid entry, get $50 in Pick6 creditsJust click here
DabbleNew users get $10 in site creditCBSDAB
Playsqor100% deposit match up to $100CBSSPORTS
Betr$10 in Betr Bucks and 50% up to $200 deposit match CBSSPORTS

Top DFS app picks for Seahawks vs. Patripts

One of the top NFL prop picks at Boom Fantasy is Drake Maye to go lower than 221.5 passing yards. Maye has gone lower in three of his last five games with an average of 196 passing yards per game in that span. The model projected 176 yards against the Seahawks, a team with one of the best defenses in the NFL as it held opponents to the fewest yards per attempt in the regular season.

At Under, one of the top picks is Seattle running back Kenneth Walker III going higher than 0.5 rushing + receiving touchdowns. Walker has scored a touchdown in three of the last five games, including in both postseason games. In the NFC divisional round, he rushed for three touchdowns in a 41-6 win over the 49ers. Five of the last eight touchdowns that New England has allowed have come via the ground game, which boosts Walker's value with this pick.

Betr: Get $10 in Betr Bucks upon registration and 50% up to $200 deposit match 

Click here and use the promo code CBSSPORTS to get $10 in Betr Bucks upon registration and 50% up to $200 deposit match with the latest Betr Picks promo code.

Boom Fantasy: $100 First entry refund

New users can click here and get a risk-free entry up to $100 in Boom Fantasy bonus funds if your pick loses with the latest Boom Fantasy promo code.

DraftKings Pick6: Play $5 on First Paid Entry, Get $50 in Pick6 Credits

Now available in Florida, new users can click here and make an initial play of $5 or more on first paid entry at DraftKings Pick6 and then get $50 credit in Pick6 credits with the latest DraftKings Pick6 promo code:

ParlayPlay: 100% deposit match up to $100 + a $5 entry ticket

Get started by clicking here, and get a first deposit match of up to $100 and a free $5 contest entry with the latest ParlayPlay promo code:

Sleeper: 100% deposit match up to $100

Click here and use the Sleeper bonus code CBSSPORTS to receive this bonus from Sleeper, which is offered in the form of site credits. 

Underdog Fantasy: Play $5, get $75 in bonus entries

Click here to get started using the Underdog Fantasy bonus code CBSSPORTS2, which offers new users $75 in bonus entries when they enter a $5 (or higher) contest. 

Dabble Fantasy: New users get $10 sign-up bonus

New users can click here and use the Dabble promo code CBSDAB to get a $10 bonus, which comes in the form of site credits.

Playsqor: 100% deposit match up to $100

Click here to use the Playsqor promo code CBSSPORTS, which gives new users a 100% deposit match up to $100.

Responsible gaming

Responsible gambling is taken very seriously across all contest sites. All provide the necessary resources and contact information if you or someone you know may have a gambling problem. The minimum age is 18 for these sites in most states, but it is 19 or older in Alabama and Nebraska and 21 or older in Massachusetts. 

Responsible gambling resources include the National Council for Problem Gambling (NCPG) and Gamblers Anonymous.

Be smart. Bet smart. Wager responsibly. Those in need of help can also call or text 1-800-MY-RESET. Help is available 24 hours per day and seven days per week.