It’s a new week, and there are Polymarket prediction markets for trading, including MLB games like the Astros (6-10) against the Mariners (7-9). Check out a $20 promo code and prediction markets for April 13.
Polymarket Promo Code
You can score early access to making prediction market trades with the Polymarket promo code BNATION. Here is how to get a $20 bonus before you start buying/selling contracts on any prediction market on Monday.
Download Polymarket. Enter promo code BNATION. Deposit at least $20. Get a $20 bonus. Make trades on sports, politics, culture, and more. Must be 18+.Astros vs Mariners Markets
There are tons of trades available on Polymarket, including games like the Astros against the Mariners at 4:10 pm ET. The Mariners are riding a 3-game winning streak, while everything is going south fast for the Astros, who have dropped 6 games in a row. Houston is hitting .281 as a team, but the pitching staff has an ERA of 6.47. The Astros have given up at least 8 runs in 5 of the 7 games of this losing streak.
The Mariners are trading at 62 cents to win today, and the contract for the game to have at least 8 runs is trading at 50 cents. Check out more markets for this game below. It will be Mike Burrows (1-2, 5.63 ERA) against George Kirby (1-2, 3.60 ERA) on the mound.
Cal Raleigh Struggling in 2026
We saw Cal Raleigh go off in 2025 with 60 home runs in a historic season. In 2026, he has been having a rough time as baseball continues to prove how unbelievably difficult it can be. Raleigh is hitting just .133, and he was 0/5 with 3 strikeouts in the Mariners 6-1 win over the Astros on Sunday. Raleigh is now 8/60 with 24 strikeouts this season. He has 2 home runs and 2 doubles, along with 10 RBI in 16 games.
In 2025, Raleigh won a Silver Slugger and was an All-Star as he finished 2nd in the MVP voting behind Aaron Judge.
(It hasn’t been a great start to 2026 for Cal Raleigh. Photo: Stephen Brashear-Imagn Images)Yankees Face the Angels on Monday
Speaking of struggling, the Yankees have lost 5 games in a row and were just swept by the Tampa Bay Rays. Tonight at 7:05 pm ET, the Yankees start a series with the Angels, who are coming off winning 2 of 3 against the Reds. The Yankees are trading at 63 cents to win tonight as they send Will Warren (1-0, 3.07 ERA) to the mound to face Yusei Kikuchi.
The Yankees are hitting just .202 with 13 home runs in 15 games. Aaron Judge smashed his 4th home run of the season in the loss yesterday, but he is hitting just .218 with an OPS of .783 to start 2026. On the mound, the Yankees’ pitching staff has an ERA of 2.60 compared to a 3.99 ERA for the Angels. Los Angeles is hitting just .210 as a team. Check out some markets on Polymarket for this game below.
More MLB Predictions
Polymarket has all sorts of markets available for MLB games today. For example, you can make trades on action like the Cubs taking on the Phillies. The Phillies are trading at 63 cents to win that game. A winning contract wins $1. The Phillies and Cubs are trading at 55 cents to have under 8.5 runs in today’s matchup. Take a look at some more MLB markets below as you get ready to make your first trades.
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