$75 Underdog promo code DIMERS updated in California for TNF

On Thursday, December 18, 2025, Underdog Fantasy’s official expansion of operations in California continues. This significant expansion for the daily fantasy operator opens with a highly aggressive welcome offer: the Underdog promo code DIMERS scores a Play $5, Get $75 in Bonus Entries promo exclusively for residents in these markets.

This development represents a major deviation from standard DFS offers. By activating the Underdog promo code DIMERS today, new users secure a substantial bankroll boost, making this $75 guarantee one of the most lucrative launch offers in the country.

Underdog Promo Code DIMERS Sets New Standard:

The Underdog Promo Code California's updated terms and conditions can be viewed here.

The launch comes at a strategic moment, coinciding with the NFL playoff push. The Underdog promo code structure for California is designed to provide immediate liquidity to new players.

Unlike deposit matches that require heavy initial investment, the Underdog promo code DIMERS guarantees the $75 payout regardless of the entry's outcome.

Key Deal Terms:

• Promo Code: DIMERS
• Offer: Play $5, Get $75 in Bonus Entries.
• Last Verified: December 18, 2025 (Live Now).

Today’s Top Opportunity with the Underdog Promo Code

The official activation of the Underdog promo code comes as the NFL season heats up with critical Week 15 action. California fans can utilize their qualifying $5 entry on tonight’s Thursday Night Football matchup to trigger the $75 bonus.

Thursday Night Football: December 18, 2025

All odds above subject to change, and provided for informational purposes.

By using the Underdog promo code to place a $5 entry on this game, accounts will be credited with $75 in bonus entries, providing a substantial bankroll for the upcoming weekend slate.

How to Activate the Underdog Promo Code DIMERS:

Underdog promo code DIMERS unlocks the DFS bonus when you follow these simple steps.

With the platform now live, accessing the elevated launch bonus requires specific steps during the registration process. The Underdog promo code must be applied as follows:

1. Application: The Underdog promo code DIMERS is entered during the account creation phase on the app or site.
2. Play: A minimum entry of $5 funds the account.
3. Qualifying Entry: A $5 entry on any eligible market (including Rams vs. Seahawks) activates the promotion.
4. Distribution: The Underdog promo code releases $75 in bonus entries to the account balance once the entry is placed.

Conclusion: Underdog in CA is A Major Development

The arrival of Underdog Fantasy in California brings more than just another app; it brings a market-shifting promotional strategy. By using the Underdog promo code DIMERS on launch week, sports fans can lock in a bonus that ensures the strongest possible start to the legal fantasy era in the West Coast.

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. See assets.underdogfantasy.com/web/PlayandGetTerms_DFS_.html for details. Offer not valid in MD, MI, NJ, NY, OH, and PA.  Concerned with your play? Call 1-800-GAMBLER or visit www.ncpgambling.org; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

To make sure you get accurate and helpful information, this guide has been edited by Damien Souness as part of our fact-checking process.