FanDuel Promo Code Scores $300 Betting Bonus for Cardinals-49ers (Sept. 21)

By Adam Martin Sep 21st, 2025 2:00 PM EDT

Tap for Promo Visit site

Bet $5, Get $300 in Bonus Bets if Your Bet Wins!

Used 22 Times Today

•

Popular in New Jersey

Must be 21+ to participate. Gambling Problem? Call 1-800-GAMBLER or visit FanDuel.com/RG (CO, IA, KY, MI, NJ, OH, PA, IL, TN, VA, VT), 1-800-NEXT-STEP or text NEXTSTEP to 53342 (AZ), 1-888-789-7777 or visit ccpg.org/chat (CT), 1-800-9-WITH-IT (IN), 1-800-522-4700 or visit ksgamblinghelp.com (KS), 1-877-770-STOP (LA), visit www.mdgamblinghelp.org (MD), 1-800-522-4700 (WY), or visit www.1800gambler.net (WV). GamblingHelpLineMA.org or call (800) 327-5050 for 24/7 support (MA). Call 1-877-8HOPE-NY or text HOPENY (467369) (NY).

New users at FanDuel Sportsbook can access the "Bet $5 Get $300 in bonus bets" welcome offer. That's right, all you have to do is deposit $10 or more, bet $5 or more on any sport, and you will get $300 in bonus bets if your bet wins.

You can lock in this sports betting promo on any of your favorite games this week, including all MLB games, NFL Week 3 matchups, College Football, and more!

NFL Sunday Week 3: Arizona Cardinals at San Francisco 49ers

• Time: 4:25 p.m. EST
• Venue: Levi’s Stadium in Santa Clara, CA
• Spread: 49ers -1.5
• Total: 43.5
• Moneyline: Cardinals +100/49ers -120

The FanDuel Promo Code is eligible for this game and all NFL Week 3 games - This is an incredible welcome bonus, and we highly encourage you to claim this offer today to earn $300 in bonus bets if your bet wins. 

Read our FanDuel Promo Code guide, which includes our expert handicapper bets, game info, NFL odds, and picks!

FanDuel Promo Code Key Details for September 21, 2025:

Tap for Promo Visit site

Bet $5, Get $300 in Bonus Bets if Your Bet Wins!

Used 22 Times Today

•

Popular in New Jersey

Must be 21+ to participate. Gambling Problem? Call 1-800-GAMBLER or visit FanDuel.com/RG (CO, IA, KY, MI, NJ, OH, PA, IL, TN, VA, VT), 1-800-NEXT-STEP or text NEXTSTEP to 53342 (AZ), 1-888-789-7777 or visit ccpg.org/chat (CT), 1-800-9-WITH-IT (IN), 1-800-522-4700 or visit ksgamblinghelp.com (KS), 1-877-770-STOP (LA), visit www.mdgamblinghelp.org (MD), 1-800-522-4700 (WY), or visit www.1800gambler.net (WV). GamblingHelpLineMA.org or call (800) 327-5050 for 24/7 support (MA). Call 1-877-8HOPE-NY or text HOPENY (467369) (NY).

How to Claim the FanDuel Promo Code Today, September 21

FanDuel Sportsbook provides a $300 bonus by just signing up for a new account, depositing at least $10, and then betting $5 or more on any sport. You will get $300 in bonus bets if your bet wins. This sports betting promo is now positioned as one of the best sports betting promos and bonuses available for the MLB, NFL, and College Football.

Here's how you can use the FanDuel Promo Code to score $300 betting bonuses:

1. Click the "Visit Site" button located in this FanDuel Sportsbook promo code
2. No actual promo code is needed -- just sign up for a new account and fill out your registration via the FanDuel Sportsbook app
3. Make your first deposit of at least $10
4. Bet $5 or more
5. Get $300 in bonus bets if your bet wins
6. You get up to seven days to use your bonus bets at FanDuel Sportsbook

You can then use your bonus bets to make any subsequent wagers that you would like. The best part about the bonus bets at FanDuel Sportsbook is that you can use them in any smaller denomination you want. All of this combined makes the FanDuel Sportsbook promo code an amazing sign-up bonus to claim.

Tap for Promo Visit site

Bet $5, Get $300 in Bonus Bets if Your Bet Wins!

Used 22 Times Today

•

Popular in New Jersey

Must be 21+ to participate. Gambling Problem? Call 1-800-GAMBLER or visit FanDuel.com/RG (CO, IA, KY, MI, NJ, OH, PA, IL, TN, VA, VT), 1-800-NEXT-STEP or text NEXTSTEP to 53342 (AZ), 1-888-789-7777 or visit ccpg.org/chat (CT), 1-800-9-WITH-IT (IN), 1-800-522-4700 or visit ksgamblinghelp.com (KS), 1-877-770-STOP (LA), visit www.mdgamblinghelp.org (MD), 1-800-522-4700 (WY), or visit www.1800gambler.net (WV). GamblingHelpLineMA.org or call (800) 327-5050 for 24/7 support (MA). Call 1-877-8HOPE-NY or text HOPENY (467369) (NY).

Sunday Slate Week 3: Cardinals vs 49ers Betting Preview

In late afternoon Sunday NFL action, the San Francisco 49ers host the Arizona Cardinals in a rivalry game between NFC West squads. The 49ers are -1.5 point favorites at home in what is one of the closest games of the week on paper.

The 49ers are 2-0 so far this year, beating the Seattle Seahawks 17-13 in Week 1 and then getting past the New Orleans Saints 26-21 in Week 2. The 49ers are a talented squad, but they recently lost their franchise QB, Brock Purdy, to injury. Backup QB Mac Jones played well against the Saints, but he is not an elite QB by any means and will likely come back to earth.

The Cardinals are also 2-0 this year, beating the Saints 20-13 and the Carolina Panthers 27-22. The Cardinals have missed the playoffs the last few seasons, but with QB Kyler Murray healthy once again, the Cardinals could very well be a surprise team and potentially win the NFC West.

Without Purdy, I expect the 49ers to struggle and have a let-down game here against a talented Cardinals team. Take the Cardinals to pull off the upset here and cover +1.5 points as an underdog.

Tap for Promo Visit site

Bet $5, Get $300 in Bonus Bets if Your Bet Wins!

Used 25 Times Today

Must be 21+ to participate. Gambling Problem? Call 1-800-GAMBLER or visit FanDuel.com/RG (CO, IA, KY, MI, NJ, OH, PA, IL, TN, VA, VT), 1-800-NEXT-STEP or text NEXTSTEP to 53342 (AZ), 1-888-789-7777 or visit ccpg.org/chat (CT), 1-800-9-WITH-IT (IN), 1-800-522-4700 or visit ksgamblinghelp.com (KS), 1-877-770-STOP (LA), visit www.mdgamblinghelp.org (MD), 1-800-522-4700 (WY), or visit www.1800gambler.net (WV). GamblingHelpLineMA.org or call (800) 327-5050 for 24/7 support (MA). Call 1-877-8HOPE-NY or text HOPENY (467369) (NY).

About the Author

Adam Martin

More About Adam

A writer based out of Toronto, Adam Martin has covered professional sports, with an emphasis on sports gambling, for more than a decade, writing for such outlets as The Toronto Star and Sportsnet. He is an expert in UFC, while also covering NHL betting and the Stanley Cup.

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