The 2026 MLB trade deadline hits today at 6 p.m. ET, and the top MLB prediction market apps are already loaded with contracts on where this summer's biggest names land.
Every one of the eight games today starts at 6:40 p.m. ET or later, so you get a full afternoon of deadline chaos before first pitch. Markets on trades, rosters, and playoff odds are moving in real time, hours before the bats come out.
Below, I rank the platforms worth keeping open on your phone as the clock ticks toward 6 p.m. ET and the MLB prediction market promos they offer new signups.
| MLB Prediction Market Apps | MLB Prediction Market Promos | Sign-Up Link |
|---|---|---|
| Polymarket | Deposit $10, Get $20 Bonus Funds | ACTION |
| FanDuel Predicts | Make Any Trade, Get $25 Bonus | Click Here |
| Kalshi | Trade $25, Get Up to a $500 Bonus | ACTION |
| Novig | Spend $25, Get $50 in Novig Coins | ACTION |
| ProphetX | Trade $10, Get $20 Bonus | TANBONUS |
What Are the Best MLB Prediction Market Apps?
Prediction markets let you trade CFTC-regulated event contracts on real outcomes. This include who wins tonight, who gets dealt, who reaches October, and more. Here are the MLB prediction market apps carrying the deepest boards for trade deadline props.
Polymarket
Polymarket is MLB's exclusive prediction market partner, pulling official league data through Sportradar. This is one of the cleanest MLB prediction market apps, with sharp pricing on the marquee matchups and headline trade questions.
If you trade mostly from your phone and want a stripped-down feel on the biggest markets, Polymarket offers the smoothest ride of the bunch.
Register with Polymarket promo code ACTION, deposit $10, and harness $20 to trade with.
| Polymarket Promo Code | Polymarket Referral Bonus | Polymarket States Available |
|---|---|---|
| Polymarket Promo Code ACTION | Deposit $10, Get $20 in Bonus Funds | AL, AK, AR, CA, CO, CT, DE, FL, GA, HI, ID, IN, IA, KS, KY, LA, ME, MN, MS, MO, NE, NH, NM, NJ, NY, NC, ND, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY, DC |
FanDuel Predicts
Launched in December 2025, FanDuel Predicts brings a familiar sportsbook look to event contracts. It's a natural landing spot for users making the jump from traditional books who still want a recognizable interface when seeking MLB prediction market apps.
One catch worth knowing: FanDuel Predicts runs in all 50 states, but their sports contracts only appear in the roughly 18 states where FanDuel doesn't already operate a sportsbook. Where they're live, the markets are backed by CME Group, and you can sell out of a position before it settles.
Sign up with the FanDuel Predicts promo code now and unlock your welcome bonus.
| FanDuel Predicts Promo Code | FanDuel Predicts Sign-Up Bonus | FanDuel Predicts States Available |
|---|---|---|
| FanDuel Predicts Promo Code (Click Here) | Sign Up and Unlock Your Offer! | AK, AL, CA, DE, FL, GA, HI, ID, MN, ND, NE, NM, OK, RI, SC, SD, TX, UT |
Kalshi
Kalshi is the heavyweight name amongst the MLB prediction market apps in this article. As the longest-running CFTC-regulated exchange in the U.S., it lists the widest MLB menu on the market: game winners, run lines, totals, player props, and division and World Series futures.
More to the point today, Kalshi has stacked "next team" contracts on nearly every player in the rumor mill. If you want depth and variety on deadline day, this is the first app to open.
Capitalize on one of the best MLB prediction market promos by redeeming Kalshi promo code ACTION. Trade $25 and net up to $500 in bonus funds.
| Kalshi Promo Code | Kalshi Sign-Up Bonus | Kalshi States Available |
|---|---|---|
| Kalshi Promo Code ACTION | Trade $25, Get Up to a $500 Bonus | AL, AK, AR, CA, CO, CT, DE, FL, GA, HI, ID, IN, IA, KS, KY, LA, ME, MN, MS, MO, NE, NH, NM, NJ, NY, NC, ND, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY, DC |
Novig
Novig is a peer-to-peer, no-vig exchange live in 45 states. You trade against other users instead of the house, which can mean tighter pricing on money lines, props, and parlay-style contracts. These perks are a nice edge to have on a high-volume day like this one.
Novig also leans hard into rewards, layering cash-back-style perks, referral credits, and ongoing promos on top of the trading itself. There are no caps on trade size, either, so a deadline-day rush of volume won't run you into a ceiling on one of the rising MLB prediction market apps.
Click the link in the table below to make your account with the Action Network Novig promo code ACTION and unlock $50 in Novig Coins after you spend $25.
| Novig Promo Code | Novig Sign-Up Bonus | Novig States Available |
|---|---|---|
| Novig Promo Code ACTION | Spend $25, Get $50 in Novig Coins | AK, AR, FL, GA, HI, IL, IN, IA, KS, KY, ME, MA, MN, MO, NE, NH, NC, ND, OH, OK, OR, SC, SD, TX, VT, VA, DC, WI, WY |
ProphetX
ProphetX is the sports purist in this group of MLB prediction market apps. It's CFTC-regulated and sports-only, meaning there are no politics, crypto, or weather markets to scroll past. This keeps the app clean and quick to move around on a hectic afternoon.
The MLB board covers money lines, run lines, total runs, first-five-inning contracts, player props, and futures. As a peer-to-peer exchange, it also lets you cash out of a position at any time, so you can lock in a winner or bail on a loser the moment trade news breaks. ProphetX is live in every state but Nevada right now, one of the widest footprints in the space.
Trade the trade deadline markets by using ProphetX promo code TANBONUS, trading $10, and getting $20 from one of the simplest MLB prediction market promos.
| ProphetX Promo Code | ProphetX Welcome Offer | ProphetX States Available |
|---|---|---|
| ProphetX Promo Code TANBONUS | Trade $10, Get $20 Bonus | AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY |
