There's a key matchup on the MLB slate today, with White Sox vs. Cubs at 8:05 p.m. ET on TBS. There are also hundreds in MLB prediction market promos ready to be pounced on to help you trade every angle of each game.
As first pitch of White Sox vs. Cubs nears, the boards are open and prices are churning by the minute. That gives you a full afternoon of lineup cards, pitching news, and weather updates to sort through after harnessing the top MLB prediction market promos.
Below, I sort the MLB prediction market apps worth pinning to your home screen for today's slate, along with their new player promotions.
| MLB Prediction Market Apps | MLB Prediction Market Promos | Sign-Up Link |
|---|---|---|
| Polymarket | Deposit $10, Get $20 Bonus Funds | ACTION |
| FanDuel Predicts | Sign Up & Unlock Your Offer | Click Here |
| Kalshi | Trade $25, Get Up to a $500 Bonus | ACTION |
| Novig | Deposit $10, Get $25 in Trade Credits | ACTION |
| DraftKings Predictions | Trade $5, Get $150 in Predictions Dollars | Click Here |
| ProphetX | Trade $10, Get $20 Bonus | TANBONUS |
What Are the Best MLB Prediction Market Promos?
On prediction markets, you buy and sell CFTC-regulated event contracts tied to things that actually play out on the diamond (who takes the win, whether a total clears the number, whether a star clips a prop line, and which clubs punch their October ticket).
These are the MLB prediction market promos carrying the most generous offers to capitalize on before tonight's TBS headliner at Wrigley Field.
Polymarket Promo Code ACTION
Polymarket holds MLB's exclusive prediction market partnership and feeds off official league data by way of Sportradar. Of all the MLB prediction market promos here, Polymarket has among the most streamlined apps, pairing tight prices with a no-clutter layout on the night's featured games.
For anyone who lives on their phone and prefers a pared-back look on the marquee markets, Polymarket delivers the easiest ride in the group.
Create an account using Polymarket promo codeACTION, put in $10, and pick up $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 Promo Code
Live since December 2025, FanDuel Predicts wraps event contracts in the sportsbook styling plenty of bettors already know by heart. That makes it an easy home for anyone migrating over from a traditional book who still wants a familiar screen while shopping MLB prediction market promos.
There's one wrinkle to keep in mind: FanDuel Predicts operates in all 50 states, yet its sports contracts only surface in the roughly 18 states where FanDuel hasn't already planted a sportsbook. In the spots where it's active, CME Group backs the markets, and you're free to sell a position before it locks in.
Register with the FanDuel Predictspromo code via the link below and grab your welcome offer.
| 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 Promo Code ACTION
Kalshi is the marquee name among the MLB prediction market apps featured here. Standing as the longest-tenured CFTC-regulated exchange in the country, it fields the broadest MLB menu going: game winners, run lines, totals, player props, plus division and World Series futures.
That range pays off on a busy Tuesday like tonight. Whether you want to price the White Sox vs. Cubs winner or dig into a Cubs player prop, Kalshi hands you the most angles to work. When depth and selection matter, start here.
Cash in on one of the strongest MLB prediction market promos by punching in Kalshi promo code ACTION. Trade $25 and reel in 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, WV, WI, WY, DC |
Novig Promo Code ACTION
Novig is now a full prediction market platform, and it puts real weight behind its rewards, stacking cash-back-style perks, referral credits, and rolling promos on top of the trading. And because there's no ceiling on trade size, a heavy night of volume won't box you in on one of the best MLB prediction market promos.
Tap the link in the table below to open an account with the Action Network Novig promo code ACTION and claim $25 in trade credits once you deposit $10.
| Novig Promo Code | Novig Sign-Up Bonus | Novig States Available |
|---|---|---|
| Novig Promo Code ACTION | Deposit $10, Get $25 in Trade Credits | 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 |
DraftKings Predictions Promo Code
DraftKings brings its household name to the exchange world with DraftKings Predictions, and it arrives with the biggest headline number on this page. A $5 first trade returns $150 in Predictions Dollars, so no other welcome offer here stretches a small buy-in as far.
This DraftKings promo code is live in 48 states, everywhere except Maine and New Hampshire, which means it covers plenty of markets where the other MLB prediction market apps on this list go dark. Your $150 does not land all at once, though. You get $50 up front after the qualifying trade, then click to claim another $50 after each of the next two weeks, and Predictions Dollars stay good for a full year from issuance.
There is no code to enter, so grab the DraftKings Predictions promo code offer below by clicking through and making a $5 trade on tonight's slate.
| DraftKings Predictions Promo Code | DraftKings Predictions Welcome Offer | 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 |
ProphetX Promo Code TANBONUS
ProphetX is the sports specialist of this bunch of MLB prediction market apps. It's CFTC-regulated and locked in on sports alone, so there's no politics, crypto, or weather clutter to swipe past. That focus keeps the app tidy and fast to navigate on a busy night.
Its MLB board spans money lines, run lines, total runs, first-five-inning contracts, player props, and futures. Being a peer-to-peer exchange, it also lets you cash out of a position whenever you like, so you can bank a winner (or cut a loser loose) the second the news drops. ProphetX is currently live everywhere except Nevada, giving it one of the widest reaches in the category.
Work Tuesday's markets by entering ProphetX promo code TANBONUS, trading $10, and pocketing $20 through one of the most straightforward MLB prediction market promos out there.
| 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 |
White Sox vs. Cubs Odds
The Crosstown Classic sends the rebuilding White Sox into Wrigley Field against a Cubs club that profiles as a clear favorite. Here are the latest prediction market odds for this game:
| Market | Contract Price (est.) | Settles At |
|---|---|---|
| Cubs to win | 64¢ | $1.00 |
| White Sox to win | 40¢ | $1.00 |
| Over 8.5 runs | 48¢ | $1.00 |
| Under 8.5 runs | 53¢ | $1.00 |
White Sox vs. Cubs Expert Pick
My expert White Sox vs. Cubs pick is the Cubs to win at 64%. Chicago's North Siders hand the ball to David Peterson against the White Sox and Davis Martin, and the gap between the two clubs is hard to ignore. The Cubs pair the deeper, more productive lineup with home-field comfort, while the White Sox continue to grind through a rebuild that leaves them short on run support. Peterson has been steady all season, and against a thin South Side order he is the more dependable arm on the mound.
How to Watch White Sox vs. Cubs
- Matchup: Chicago White Sox at Chicago Cubs
- Date: Tuesday, August 18, 2026
- First pitch: 8:05 p.m. ET
- TV: TBS
- Venue: Wrigley Field, Chicago
- Probable pitchers: David Peterson (CHC) vs. Davis Martin (CHW)
