Sunday delivers a full MLB slate, with the first pitch landing at 12:15 p.m. ET and the last game starting at 8:20 p.m. ET. MLB prediction market apps let traders take a yes-or-no position on every matchup on the board, from the early window straight through the nightcap. Every club plays, so the trading menu stays open for roughly eight straight hours.
NBC carries Astros vs. Padres for Sunday Night Baseball at 8:20 p.m. ET. Houston and San Diego both chase October positioning, and contract prices on that game swing hard inning by inning as bullpens turn over.
Six of the best prediction market promos stand out ahead of the slate. Polymarket, FanDuel Predicts, Kalshi, Novig, DraftKings Predictions, and ProphetX each greet new traders with a bonus, and the table below puts every offer in one place.
| MLB Prediction Markets | MLB Prediction Market Apps | Sign-Up Link |
|---|---|---|
| Polymarket | Deposit $10, Get $20 Trading Bonus | ACTION |
| FanDuel Predicts | Sign Up & Unlock Your Offer | Click Here |
| Kalshi | Trade $25, Get Up to $500 Bonus | ACTION |
| Novig | Spend $25, Get $50 in Novig Coins | ACTION |
| DraftKings Predictions | Trade $5, Get $150 in Predictions Dollars | Click Here |
| ProphetX | Trade $10, Get $20 Bonus | TANBONUS |
Best MLB Prediction Market Apps for Sunday, August 9
Every platform below runs as an exchange. Traders buy and sell contracts against one another instead of accepting a posted number, and prices update the moment news lands. MLB lineups drop a few hours before each first pitch, and those cards reprice markets in seconds. Claiming several MLB prediction market promos at once spreads a starting bankroll across multiple MLB prediction market apps for the entire Sunday card.
1. Polymarket
Polymarket leads this group on sheer depth. Game winner contracts cover the whole Sunday schedule, and season-long markets run alongside them, including both MLB MVP races and World Series contracts. Traders exit a position mid-game rather than riding a ticket to the final out.
The Polymarket promo code ACTION turns a $10 deposit into $20 in bonus funds. That stake covers an opening trade on Astros vs. Padres or any afternoon matchup, and Polymarket reaches 43 states plus Washington, D.C.
| 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 |
2. FanDuel Predicts
FanDuel Predicts brings the most familiar layout of these MLB prediction market apps. Anyone with a FanDuel account can reach baseball contracts in a couple of taps, which matters on a Sunday with six or seven games overlapping in the afternoon window. The app suits newcomers who want prediction markets without a steep learning curve.
Signing up unlocks the current welcome offer. Coverage spans the entire slate, so traders who research MLB picks over morning coffee act on them all day.
| FanDuel Predicts Promo Code | FanDuel Predicts Sign-Up Bonus | FanDuel Predicts States Available |
|---|---|---|
| FanDuel Predicts Promo Code (Click Here) | Sign Up & Unlock Your Offer | AK, AL, CA, DE, FL, GA, HI, ID, MN, ND, NE, NM, OK, RI, SC, SD, TX, UT |
3. Kalshi
Kalshi posts the largest bonus of these MLB prediction market promos. A $25 trade unlocks up to $500 with the Kalshi promo code ACTION, and the CFTC-regulated exchange lists baseball next to politics, economics, and entertainment markets.
Kalshi also runs weather contracts, a natural pairing for anyone who checks an MLB weather report before committing. August rain risk across the Midwest and Northeast affects several early games.
| Kalshi Promo Code | Kalshi Sign-Up Bonus | Kalshi States Available |
|---|---|---|
| Kalshi Promo Code ACTION | Trade $25, Get Up to $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, WV, WI, WY, DC |
4. Novig
Novig separates itself from other MLB prediction market apps with a zero-commission exchange model. Traders keep the full value of a winning contract instead of paying a built-in margin on every entry, which adds up across a long Sunday.
The Novig promo code ACTION converts $25 in spend into $50 in Novig Coins. Market coverage runs all day, including Astros vs. Padres under the lights in San Diego.
| 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 |
5. DraftKings Predictions
DraftKings Predictions arrives with the lowest entry point of any offer on this page. A $5 trade returns $150 in Predictions Dollars, so a small first position stretches across the afternoon window and the primetime finale.
DraftKings customers recognize the interface immediately, and the exchange lists game markets on all of Sunday's matchups, including Astros vs. Padres. Availability covers 48 states.
| DraftKings Predictions Promo Code | DraftKings Predictions Sign-Up Bonus | DraftKings Predictions States Available |
|---|---|---|
| DraftKings Predictions Promo Code (Click Here) | Trade $5, Get $150 in Predictions Dollars | AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, MD, MA, MI, MN, MS, MO, MT, NE, NV, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY |
6. ProphetX
ProphetX covers the widest map here, operating in 49 states plus Washington, D.C. That footprint makes it one of the best prediction market apps for traders living where other exchanges have yet to launch.
The ProphetX promo code TANBONUS turns a $10 trade into a $20 bonus. ProphetX lists player markets beside game markets, so anyone tracking MLB lineups reacts the second managers post their cards.
| 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 |
