The Miami Marlins and Washington Nationals close a four game series from Nationals Park tonight at 6:45 p.m. ET on FS1, and Kalshi referral code ACTION helps unlock a $25 bonus to fund Marlins vs. Nationals predictions. Register now, trade $25 in contracts, and Kalshi credits the bonus whether your first position hits or misses.
I have signed up on all the prediction market apps, and Kalshi is the one I come back to most often. The Action Network-verified Kalshi referral code ACTION is just one reason for that. Tap below to register for an account and trade MLB, as well as the first round in the US Open tennis major tournament.
What is Kalshi Referral Code ACTION?
| Detail | Terms |
|---|---|
| Code | ACTION |
| Offer | Trade $25, get a $25 bonus |
| Bonus type | Trading credit, 1x rollover, separate from withdrawable cash |
| Who qualifies | New accounts, 18 and older, most US states |
| Tonight's markets | MLB, US Open tennis, NFL and college football futures |
Claim the Kalshi referral code ACTION in just four steps to begin trading the final game in the Marlins-Nationals series:
- Tap any Kalshi registration link on this page to begin signing up
- Enter Kalshi promo code ACTION in the prompted field during registration
- Verify your identity by uploading an image of your photo ID and a selfie
- Fund your account and trade $25 on Kalshi predictions to trigger $25
The registration flow took me only a handful of minutes, which is generally the amount of time it takes for me to sign up on prediction markets.
Marlins vs. Nationals Odds: Kalshi vs. Polymarket
Prediction markets like Kalshi and Polymarket price games in cents, meaning the price you see mirrors that of the implied probability on an outcome. Here is how Kalshi and their biggest competitor (Polymarket) price Marlins-Nationals MLB odds:
| Market | Kalshi | Polymarket |
|---|---|---|
| Marlins win | 54¢ | 56¢ |
| Nationals win | 47¢ | 45¢ |
| Over 8.5 runs | 51¢ | 52¢ |
My Marlins vs. Nationals Prediction
I side with the Marlins moneyline at 54¢ on Kalshi for the following reasons:
- Ryan Gusto enters this game with a 3.98 ERA and has only allowed five runs in his last five starts across 24 1/3 innings
- Gusto blanked this same Nationals lineup for four innings on Aug. 21
- Will Dion gets his first MLB start for Washington after 18 relief appearances, meaning the bullpen figures to play nearly half the total game
Miami won Sunday 6-2 and controlled the last five meetings. I think a big advantage at starting pitcher carries the Marlins to a win and a 2-2 split in this series.
Also Trade US Open Prediction Markets Today
In addition to MLB, trade US Open predictions at Kalshi today Kalshi lists Carlos Alcaraz near 26¢ to win the men's tournament, while Aryna Sabalenka is priced at 24¢ for the women. Redeem Kalshi promo code ACTION and put $25 on the line to activate $25 worth of bonus funds.
Trade NFL Futures Markets As Well
After you predict the marquee MLB game of the night and the US Open, get in on NFL futures odds at Kalshi. With the regular season beginning next week, now is a prime time to find favorable prices and make trades on markets like the Rams odds to win Super Bowl LXI with Aaron Donald back on the field.
Register Now With the Kalshi Referral Code ACTION
If you like our rundown of the Kalshi sign-up bonus and expert MLB or US Open picks, take advantage of house money. Sign up by applying the Kalshi referral code ACTION from Action Network during registration, and trade $25 tonight.
This $25 welcome bonus provided by the Kalshi referral code ACTION is only live for a limited window, so secure it while the opportunity presents itself.
Certain limitations apply. The offer is available to new users only, subject to the terms and conditions. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information. Not available in AZ, IL, MA, MD, MI, MT, NV, OH, and WA.
