Take advantage of the new Underdog promo code TOPACTION and score a $75 welcome bonus on Monday, December 8, 2025. With this verified sign-up offer from Action Network, you can submit a $5 lineup using picks from any sport, and whether you win or lose, you get $75 in bonus entries.
After claiming your welcome bonus with the Underdog promo code TOPACTION, you can create a lineup featuring players from any sport, including the NFL. Tonight’s Monday Night Football matchup pits the Philadelphia Eagles against the Los Angeles Chargers at 8:15 p.m. ET on ESPN.
Underdog is one of the leading daily fantasy sports (DFS) apps and an excellent alternative to online sports betting. For example, California users looking to make picks on the Chargers can’t use sportsbooks, making Underdog their go-to option.
Sign up now and use the Underdog promo code TOPACTION in any of the following states: AL, AK, AR, CA, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, and WY.
Use Underdog Fantasy Promo Code TOPACTION on Eagles vs. Chargers Lineup
Don't miss your chance to claim the new Underdog Fantasy promo code TOPACTION, offering a $75 welcome bonus for the Eagles vs. Chargers game. Action Network writer and DFS expert Nick Goodling can personally vouch for this sign-up offer.
"If you’re looking to maximize your Monday Night Football experience, this bonus is an easy way to start strong," says Nick Goodling. "Submit a $5 lineup, use the Underdog promo code TOPACTION, and you instantly unlock $75 in bonus entries to take your picks further."
Once you complete the sign-up process, it's time to submit your lineup for Monday Night Football. Choose "Higher" or "Lower" on a player projection to add that pick to your lineup. As you add more picks, you earn a bigger payout, with a perfect eight-pick lineup yielding a 120x payout.
If your Underdog lineup has three or more picks, you must choose between the Standard and Flex lineup. The Standard lineup offers the largest payout, but you must win every pick. The Flex entry gives a smaller payout with a perfect lineup, but you still profit or get your stake back if one pick loses.
Use this opportunity to unlock $75 in bonus entries with the Underdog promo code TOPACTION. Sign up today and submit a lineup for the Eagles vs. Chargers game on Monday Night Football.
| Player | Team | Pick |
|---|---|---|
| Jalen Hurts | Philadelphia Eagles | Higher Than 30.5 Rushing Yards |
| Ladd McConkey | Los Angeles Chargers | Lower Than 51.5 Receiving Yards |
| Kimani Vidal | Los Angeles Chargers | Higher Than 36.5 Rushing Yards |
How to Sign Up Using Underdog Promo Code TOPACTION
Follow the steps below to claim the Underdog promo code TOPACTION and make your first deposit and lineup on Saturday:
- Step 1: Use the Underdog promo code TOPACTION sign-up module on this page to download the Underdog app.
- Step 2: Create a username and password.
- Step 3: Fill in your email, date of birth, and all other required personal information to create a new Underdog account.
- Step 4: Enter the Underdog Fantasy promo code TOPACTION for a play $5, get $75 in bonus entries offer.
- Step 5: Agree to the Underdog Terms of Use and Privacy Policy. Confirm you are at least 18 years old (19+ in Alabama/Nebraska, 21+ in Massachusetts/Arizona).
- Step 6: Click "Sign Up."
- Step 7: Make your first deposit of $10+.
- Step 8: Create your first entry at Underdog with picks from the NFL or any other sport.
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).
