March Madness Sportsbook Promos: Best Bets For Cooper Flagg & Duke

Written By Road to CFB | Published at March 20, 2025

Cooper Flagg promos — Duke forward Cooper Flagg dunks during the second half of a game against North Carolina on March 8 in Chapel Hill, N.C. (AP photo / Chris Seward)

The biggest name in NCAA men’s basketball is Duke star Cooper Flagg, and the fabulous freshman is expected to return from a one-week absence due to an ankle injury in time for March Madness.

With Flagg hopeful to play in Friday’s first-round matchup, Duke (+325) remains the favorite to win it all this spring. Sportsbooks are offering several markets related to Flagg’s performance as the Player of the Year candidate looks to carry the Blue Devils to a title.

Best March Madness promos

Sportsbook

Bonus

Features

Bet

Up To $1500 in Bonus Bets Paid Back if your First Bet Does Not Win

Wide coverage of US and international sports
Linked to MGM Rewards loyalty program
Regular odds boosts and promos

Bet Now BetMGM Review

Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET (Available in the US) Call 877-8-HOPENY or text HOPENY (467369) (NY) Call 1-800-327-5050 (MA) 21+ only. Please Gamble Responsibly. Call 1-800-NEXT-STEP (AZ), 1-800-BETS-OFF (IA), 1-800-981-0023 (PR). Rewards are non-withdrawable bonus bets that expire in 7 days. In partnership with Kansas Crossing Casino and Hotel. See BetMGM.com for Terms. US promotional offers not available in DC, Mississippi, New York, Nevada, Ontario, or Puerto Rico.

New Customers: Bet $5+ Get $200 in Bonus Bets Instantly

Wide coverage of US and international sports
High-quality iOS and Android apps
Very fast withdrawal times

Bet Now DraftKings Review

GAMBLING PROBLEM? CALL 1-800-GAMBLER or 1-800-MY-RESET, (800) 327-5050 or visit gamblinghelplinema.org (MA). Call 877-8-HOPENY/text HOPENY (467369) (NY). Please Gamble Responsibly. 888-789-7777/visit ccpg.org (CT), or visit www.mdgamblinghelp.org (MD), 1-800-981-0023 (PR). 21+ and present in most states. (18+ DC/KY/NH/PR/WY). Void in NH/OR/ONT/PR. Eligibility restrictions apply. On behalf of Boot Hill Casino (KS). Pass-thru of per wager tax may apply in IL. 1 per new customer. Min. $5 first-time bet req. Max. $200 issued as non-withdrawable Bonus Bets that expire in 7 days (168 hours). Stake removed from payout. Plus, upon qualifying bet placement, get 1 100% Profit Boost Token, valid only for a NCAA Tournament Winner bet. Max. Bet: $10. Profit Boost Tokens are single-use and expire on 4/6/26 at 11:59 PM ET. Must select Token BEFORE placing bet. Boost only applies to winnings. Ends 4/6/26 11:59 PM ET. Terms: Promos | DraftKings Sportsbook

Double Your Winnings on Your First 10 Bets! $50 Max Bets

Only sportsbook legal in Florida
Hot Bets feature
Live NFL streaming

Bet Now Hard Rock Bet Review

To be eligible, the Player must be at least 21 years old, physically located in an Eligible Jurisdiction: AZ, CO, IL, IN, MI, NJ, OH, TN, or VA, and not on any exclusionary lists in any Eligible Jurisdiction. Excluded patrons are prohibited from participating in Promotions. To be eligible all personal and contact data associated to your account must be verifiable. GAMBLING PROBLEM Arizona Customers: Call 1-800-NEXT-STEP or Text NEXTSTEP to 53342. Colorado, Illinois, Michigan, New Jersey, Ohio, and Virginia Customers: Call 1-800-GAMBLER Indiana Customers: Call 1-800-9-WITH-IT Tennessee Customers: Call or text the Tennessee REDLINE: 1-800-889-9789

Get $300 Back in Bonus Bets Every Day For 10 Days

Offers one of the best same-game parlays
Highly rated mobile app
Impressive sports coverage

Bet Now FanDuel Review

Gambling Problem? Call 1-800-GAMBLER or visit RG Help . Call 1-888-789-7777 or visit Helpline and Chat – CONNECTICUT COUNCIL (CT). Hope is here. MA Gambling Helpline or call (800) 327-5050 for 24/7 support (MA). Visit Home (MD). Call 1-877-8HOPE-NY or text HOPENY (467369) (NY) 21+ (18+ D.C., KY, WY) and present in select states (for KS, in affiliation with Kansas Star Casino). First online real money wager only. $5 first deposit required. Bonus issued as nonwithdrawable bonus bets which expire 7 days after receipt. Restrictions apply. See terms at FanDuel Sportsbook

Bet $50, Get $300 in FanCash

Unique FanCash loyalty program
Variety of bonuses and ongoing promos
Fast, reliable app with live betting and streaming

Bet Now Fanatics Review

Must be 21+. GAMBLING PROBLEM? CALL 1-800-GAMBLER or 1-800-522-4700, Home (MD), (800)-327-5050 or MA Gambling Helpline (MA), Call (877)8-HOPENY or text HOPENY (467369) (NY), or Call 1-800-NEXT-STEP or text NEXTSTEP to 53342 (AZ), (888) 789-7777 or CONNECTICUT COUNCIL – ON PROBLEM GAMBLING (CT), or 1-800-9-WITH-IT (IN), If gambling is more than a game, free help is available . . . - NCDHHS Problem Gambling (NC). New customers in AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, or WY. Must opt-in and wager $10+ cash on any market with odds of -500 or longer to receive $100 in FanCash each day for your first 3 days (issued when qualifying wager settles). Your 3 days begin the day you establish your account. FanCash rewards expire at 11:59 p.m. ET 7 days from issuance. Terms, including FanCash terms, apply - see Fanatics Sportsbook app.

Keep an eye out for offerings from sportsbooks for new customers as bet365 debuts in two new states and other books look to compete for new action during March Madness.

Best Cooper Flagg bets for March Madness

Flagg finished the regular season with averages of 18.9 points, 7.5 rebounds, 4.1 assists, 1.5 steals, and 1.3 blocks per game while shooting 48.8% from the floor. His minutes could be limited when Duke faces No. 16 seed Mount St. Mary's on Friday.

Loaded with experience and talent beyond Flagg, the Blue Devils are the No. 1 seed in the East Region, with Alabama, Wisconsin, and Arizona checking in as the other top seeds in the region. Duke is getting short odds of around -300 to reach the Elite Eight and is closer to even money — around -120 — to make the Final Four.

At FanDuel, Flagg is the favorite to win Final Four Most Outstanding Player at +370 odds. He is the favorite (-220) to win the Wooden Award as the best regular season player.

In the head-to-head market, or Team to Advance Further, you can get Duke at -125 odds to get farther than Auburn (+105) at DraftKings. The book offers +150 odds for either Duke or Auburn (the No. 1 overall seed) to win the tournament and +320 odds for Duke vs. the field.

Odds boost tokens are being offered at BetMGM along with a free contest called March Matchups, where customers can pick games and answer questions to earn a share of a $250,000 prize pool of bonus bets.

Individual markets and bets are often boosted at bet365, along with specific parlays. Keep an eye out for changes to odds in Duke games as the tournament progresses. The book also offers an early payout promotion where moneyline bets cash if the backed team is leading by 15-plus points.

Markets are also available at most books for which NBA team will draft Cooper Flagg. He is expected to be the No. 1 overall pick if he declares for the draft, but the star forward has left the door open for a return to Duke.

Best Bet for Cooper Flagg in March Madness

Final Four Most Outstanding Player (+370 at FanDuel)

Flagg has lived up to the hype at every juncture throughout his early career, and shining on the biggest stage would come as no real surprise. The Blue Devils’ supporting cast should help him reach the Final Four, with Duke earning a relatively favorable draw in the East Region.

Flagg’s game is less dependent on outside shooting since he can score at all three levels and make a significant impact with his defense. If he wins a head-to-head matchup against another star in the national championship, it will be hard for voters to pick another candidate for this award.