The Kalshi promo code ACTION is the best MLB prediction market promo available for Sunday Night Baseball — register, complete $25 in qualifying trades, and up to $500 in bonus trading funds lands automatically. Boston visits UNIQLO Field at Dodger Stadium for the series finale at 7:20 p.m. ET on NBC and Peacock, with Jake Bennett taking the ball for the Red Sox.
Action Network's pick: Red Sox to win — Kalshi contract price $0.38 per share (38% implied probability). Boston has been one of the most consistent underdogs in baseball lately, carrying one of the better rotation ERAs in the majors into a series finale where the historical totals trends heavily favor the low-scoring outcome. The Under 8.5 runs at $0.55 is the natural complement — 7-0 in the Dodgers' last seven game 3s of a series and 6-1 in the Red Sox's last seven overall. For new users who want maximum bonus value on tonight's NBC broadcast, this is the best MLB prediction market promo on the board ahead of Red Sox vs. Dodgers.
Kalshi Promo Code ACTION Overview
- Code: ACTION
- Offer: Trade $25, Get Up to $500 in Bonus Trading Funds
- Qualifying trade: $25 cumulative — one position or split across multiple contracts
- Payout: Bonus posts automatically once threshold is met
- No winning trade required
- Eligibility: New users only, 18+, not available in AZ, IL, MA, MD, MI, MT, NV, or OH
Kalshi is a CFTC-regulated peer-to-peer exchange — no house, no margin baked into the line. Contract prices run from $0.01 to $0.99 and reflect live crowd-sourced probability that updates continuously as the game develops. The Kalshi promo code ACTION and Kalshi referral code ACTION are interchangeable — entering either at registration activates the same welcome offer. Among all prediction market promos available for Sunday's MLB slate, the $500 ceiling on a $25 qualifying trade puts this offer in a category of its own across all prediction markets available tonight.
Red Sox vs. Dodgers — Live Kalshi Contract Prices (7:20 p.m. ET, NBC, UNIQLO Field at Dodger Stadium)
Check the latest MLB odds alongside Kalshi contract prices before first pitch.
| Outcome | Kalshi Price | Implied Probability |
|---|---|---|
| Dodgers Win | $0.62 | 62% |
| Red Sox Win | $0.38 | 38% |
| Under 8.5 Runs | $0.55 | 55% |
| Over 8.5 Runs | $0.45 | 45% |
Verify on Kalshi before trading. Prices update in real time.
A user backing the Red Sox at $0.38 could purchase 66 contracts for approximately $25.08, clearing the qualifying threshold in one position. A Boston win returns $66 — roughly $40.92 in gross profit before fees — alongside the full welcome bonus.
How to Claim the Kalshi Promo Code ACTION
- Tap any Kalshi link on this page or use the Kalshi promo code ACTION link directly.
- Download the Kalshi app on iOS or Android or register on the desktop site.
- Enter ACTION in the referral code field before completing registration.
- Complete the required identity-verification step.
- Fund your account via debit card, Apple Pay, or bank transfer.
- Complete at least $25 in qualifying trades on Red Sox vs. Dodgers or any available market.
- Collect your bonus automatically — no customer service contact needed.
What Sets Kalshi Apart for Tonight's Game
Kalshi is one of the best prediction market apps for a nationally broadcast series finale because it treats the game as a live market rather than a fixed number set before first pitch. Every bullpen decision, every Boston rally, every Shohei Ohtani at-bat in a critical spot — each one flows directly into contract prices in real time. That's a fundamentally different experience from conventional sports betting, and it's what makes tonight's Red Sox vs. Dodgers board particularly well-suited to the platform.
The historical trends give the market clear directional structure heading into first pitch — and Kalshi's live repricing means traders who are already positioned can react immediately when those trends start playing out across nine innings. For users who also want a fixed-odds sportsbook account alongside Kalshi, the MLB betting promos page covers the top welcome deals available tonight.
Claim the $500 bonus with the Kalshi promo code ACTION below:
Kalshi Promo Code ACTION — FAQ
What is the Kalshi promo code ACTION offer?
Trade $25 on any eligible Kalshi market and get up to $500 in bonus trading funds automatically. No winning trade required — the bonus posts once your cumulative qualifying trades reach $25.
Is the Kalshi promo code the same as the Kalshi referral code?
Yes. The Kalshi promo code ACTION and the Kalshi referral code ACTION are interchangeable — entering either at registration activates the same Trade $25, Get Up to $500 welcome offer.
Can I use the Kalshi promo code ACTION on Red Sox vs. Dodgers?
Yes. The bonus applies to any Red Sox vs. Dodgers contract — moneyline, run total, run line, or player props. The $25 qualifying threshold can be cleared in a single position or distributed across multiple contracts.
What is the best trade on Red Sox vs. Dodgers tonight?
Red Sox to win at $0.38 is the value position. Boston has been winning as an underdog consistently and the historical Under trends — 7-0 in the Dodgers' last seven game 3s of a series — make the Under 8.5 at $0.55 the natural complement.
What states is the Kalshi promo code ACTION available in?
Available in most U.S. states — currently not available in AZ, IL, MA, MD, MI, MT, NV, or OH. Confirm your state qualifies before depositing.
How quickly does the Kalshi bonus post?
Automatically, once your cumulative qualifying trades reach $25 — typically within minutes. No customer service contact needed.
Is Kalshi a legitimate platform?
Yes. Kalshi is a CFTC-regulated designated contract market and the first event-contract exchange to receive full federal regulatory approval in the United States.
Certain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 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, and OH.
