New traders who sign up with Kalshi promo code ACTION trade $25 and collect a $25 bonus, and Sunday afternoon's MLB game on national TV gives you a strong spot to put it to work.
The Sunday, August 30 MLB slate runs all day, but the featured matchup comes from Queens: Astros vs. Mets at 3:10 p.m. ET on NBC and Peacock.
Kalshi Promo Code ACTION Offer Details
| Promo Code | ACTION |
|---|---|
| Offer | Trade $25, get $25 bonus |
| Available States | AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IN, KS, KY, LA, ME, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY |
| Markets | MLB, tennis, and more |
How to Claim the Kalshi Promo Code ACTION Bonus
- Tap any link on this page to open the Kalshi registration page.
- Enter your name, email, and address to create your account.
- Apply the Kalshi promo code ACTION during sign-up.
- Deposit at least $25 and take a position on any market.
- Collect your $25 bonus and use it on Sunday's MLB games.
The low buy-in makes this one of the more approachable welcome offers across the best prediction market apps, since you never need to risk more than $25 to unlock the full bonus.
Astros vs. Mets Odds and Prediction
3:10 p.m. ET, NBC
Houston closes out a three-game set at Citi Field with its season hanging in the balance. The Astros have hovered around .500 for weeks while an injury-wrecked rotation forced them to churn through starter after starter, and every remaining game carries weight in a crowded American League picture. New York enters well out of the race and playing for next year, which shows up in a rotation now built around rookies who weren't on anyone's radar in March.
Probable Starters: Ethan Pecko vs. Zac Thornton
Both teams hand the ball to a rookie, which is the whole story of this matchup. Pecko, Houston's sixth-round pick out of Towson in 2023, debuted on August 19 and is still finding his footing at this level. He works off a 94-mph fastball-sinker combo he throws about half the time, backed by an 83-mph slider and a cutter. The Triple-A line was middling in the hitter-friendly Pacific Coast League, but his stuff plays up thanks to late movement.
Thornton has been one of the genuine surprises of the Mets' season. The 24-year-old lefty carries an ERA in the low threes with elite control — walks around 2.6 per nine — though he does it without missing many bats, striking out fewer than six per nine. That profile means contact management decides his day. If the Astros square him up early, it can get ugly fast; if he's locating, he'll work deep and hand things off with a lead.
With two inexperienced arms and both bullpens likely to shoulder the middle innings, this is a spot where in-game pricing moves quickly.
Pick: Astros ML (48%)
Houston is the better roster getting the slightly cheaper price, and the Astros have been one of baseball's most reliable underdogs this season, winning better than half of the 70-plus games in which they were the dog. Thornton's sub-six strikeout rate leaves him dependent on soft contact, and a Houston lineup that puts the ball in play is exactly the kind of test that can push a control-first lefty out early.
US Open First Round Underway Sunday
Afternoon baseball anchors the day, but the US Open runs alongside it, and Kalshi already lists markets on first-round matches plus outright winner questions for both draws.
Coverage runs from noon to 3 p.m. ET on ABC, 3 p.m. to 4:30 p.m. ET on ESPN2, and 4:30 p.m. to 11 p.m. ET on ESPN, so there's a full slate to trade before and after first pitch. Defending champion Carlos Alcaraz opens against Roman Safiullin in his first singles match since April, Novak Djokovic draws Mariano Navone, and Aryna Sabalenka begins her title defense against Camila Osorio. Jannik Sinner withdrew with a knee injury, which handed the No. 1 seed to Alexander Zverev and reshaped the top half of the men's draw.
Outright markets give you a place to park an opinion for two weeks instead of a few hours, and they tend to move fastest in the opening days as seeds get tested. Keep an eye on prediction market promos through the first week as platforms compete for new traders during one of the busiest stretches on the calendar.
Why Trade MLB on Prediction Markets
Prediction markets price outcomes as yes-or-no contracts, so you see exactly what the crowd thinks a team's chances are at any moment. That structure also lets you exit a position mid-game instead of waiting out a bad start.
Recent Kalshi MLB partnerships push baseball markets even further into the mainstream, and traders who follow our Kalshi predictions get a clear read on where the numbers sit before first pitch.
Sign up with Kalshi promo code ACTION, trade $25, and collect your $25 bonus in time for Sunday's MLB slate. Kalshi promo code ACTION applies at registration only, so enter it before your first deposit.
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.
