Tertius News is an AI-native newsroom: an AI model reads the linked source articles below and extracts what each outlet reported, so you can compare their coverage side by side. How this works →

Polymarket Offers $20 Sign-Up Bonus for New MLB Bettors

Polymarket is offering new customers a $20 sign-up bonus after an initial deposit of at least $10. The promotion is available for Monday's MLB games, including the Red Sox-Mariners matchup, with eligibility requiring users to be 18 or older and in an approved state.

By Tertius News AI Desk 2 distinct · 2 mastheads · 2 articles Version 1 Coverage Aug 31 – Sep 1, 2026 Published 1h ago

Polymarket Launches $20 Sign-Up Bonus for New Users

Polymarket, the prediction market platform, is currently offering new customers a $20 sign-up bonus. According to promotional materials, users can claim the bonus by creating an account and making an initial deposit of at least $10. The offer is available for Monday's MLB slate, with the bonus funds usable on any prediction market, including the Boston Red Sox versus Seattle Mariners game.

How to Claim the Bonus

The bonus is unlocked automatically after the qualifying deposit. Users must meet standard eligibility requirements: they must be 18 years or older and physically located in an eligible state. The promotion is not available to residents of Michigan or Nevada, as noted in the promotional terms.

Two different promo codes have been publicized for this offer. One source lists the code as NOLA, while another reports it as WTOP. Both sources describe the same bonus structure: a $20 bonus after a $10 initial deposit. New users should verify the correct code at the time of registration.

Monday's MLB Matchups

The promotional materials highlight several Monday games, including the Red Sox hosting the Mariners and the Yankees visiting the Angels. The Red Sox enter the game as the favorite with -162 odds, while the Mariners are the underdog at +147, according to one source.

Both teams are looking to bounce back from tough weekends. Boston (74-63) suffered a 16-1 loss to the Yankees on Sunday, though the lineup received a boost with the return of Roman Anthony and Trevor Story, who each recorded two hits in their first game since May. Seattle (64-73) was swept by the Blue Jays, including a 7-0 shutout. The Mariners may also see the promotion of 21-year-old Cuban outfield prospect Lazaro Montes, according to one report.

Additional Games and Future Markets

The bonus can also be used on other Monday matchups, such as the Cubs-Brewers game. Polymarket is also expected to offer markets on college football this weekend and the NFL when it returns, making the bonus useful for a variety of sports.

How each outlet told it

A framing line is our reading of that outlet's own text — an interpretation, not a quotation and not a fact we assert. Check it against what the outlet published.

Baton Rouge Advocate

Framing: Promotes a specific promo code for a sports betting bonus, emphasizing the $20 MLB incentive. — Promotional and informative

as of Sep 1, 2026, 1:46 AM UTC

Facts Included:

Polymarket promo code NOLA offers a $20 bonus after a $10 trade on MLB games.
Users receive a $20 sign-up bonus after an initial trade of $10 or more.
The bonus applies to the Mariners-Red Sox matchup and other MLB games this week.
Polymarket will have options on college football this weekend and the NFL when it returns.
Promo code bonus last verified on August 31, 2026.
New customers can secure a $20 sign-up bonus for the Seattle Mariners vs. Boston Red Sox clash.
The $20 bonus unlocks automatically after an initial deposit of at least $10.
Participants must be 18 or older and physically present in an eligible state.
The offer is not available to residents of Michigan or Nevada.
Boston is 74-63 and seeking an offensive rebound after a 16-1 loss to the Yankees.
Boston's lineup received a boost with the return of Roman Anthony and Trevor Story.
Seattle is 64-73 after a weekend sweep by the Blue Jays, including a 7-0 shutout.
Seattle may promote 21-year-old Cuban outfield prospect Lazaro Montes.
Boston enters the full-game prediction market as the home favorite.

Read the source article →

WTOP

Framing: Promotional focus on claiming a $20 Polymarket bonus using promo code WTOP for MLB betting. — Promotional and encouraging

as of Aug 31, 2026, 11:45 PM UTC

Facts Included:

Polymarket is offering a sign-up bonus of $20.
The promo code is WTOP.
New customers must make an initial deposit of at least $10.
Eligibility requires being 18+ and physically located in an eligible Polymarket state.
The article mentions MLB games on Monday, including Boston Red Sox vs. Seattle Mariners and New York Yankees vs. Los Angeles Angels.
It provides betting odds: Red Sox -162, Mariners +147, Yankees -141, Angels +121.
Steps to claim the bonus are outlined: create account, verify identity, enter promo code, make deposit.

Read the source article →

What was claimed, and who backed it

AI-extracted; can misattribute a claim — see Methodology.

Each row is one claim, attributed to the outlet whose wording states it most clearly. Confidence rates how directly the source text states the claim — explicit and unhedged rates high; hedged, pieced-together, or internally inconsistent statements rate lower. It does not measure whether the claim is true. Status is Contested when two claims on this page negate each other; otherwise it counts the distinct outlets we found asserting that specific claim — so a single-source claim can still show high confidence, and a multi-source claim can show medium. Every one of those outlets is named beside the status, so you can check the count against the list. For claims extracted before we began storing that list, the row says so: it names the outlet the claim is quoted from and states that we have not recorded which outlets backed it. Outlets wrote at different times, so a figure that evolves — a casualty count, for example — can legitimately differ between rows; check the "as of" time next to each claim's source.

Claim	Confidence	Status
ClaimPolymarket is offering a $20 sign-up bonus.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe promo code for the bonus is WTOP.	ConfidenceHigh	StatusSingle-source via WTOP as of Aug 31, 2026, 11:45 PM UTC
ClaimThe promo code for the bonus is NOLA.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimNew customers must make an initial deposit of at least $10 to receive the $20 bonus.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe promo code is NOLA.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe bonus requires an initial trade of $10 or more.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe bonus requires an initial deposit of at least $10.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimEligibility requires being 18+ and physically located in an eligible Polymarket state.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe offer is not available in Michigan or Nevada.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe Monday MLB games include a matchup between the Boston Red Sox and the Seattle Mariners.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimBoston Red Sox are the favorite against the Seattle Mariners.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe Yankees have a better team ERA than the Angels (3.21 vs 4.28).	ConfidenceHigh	StatusSingle-source via WTOP as of Aug 31, 2026, 11:45 PM UTC
ClaimThe Yankees are the favorite to beat the Angels in their Monday game.	ConfidenceHigh	StatusSingle-source via WTOP as of Aug 31, 2026, 11:45 PM UTC
ClaimThe Red Sox are the favorite to beat the Mariners in their Monday game.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via WTOP as of Aug 31, 2026, 11:45 PM UTC, Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe Red Sox have a better batting average than the Mariners.	ConfidenceHigh	StatusSingle-source via WTOP as of Aug 31, 2026, 11:45 PM UTC
ClaimBoston has a better team ERA than Seattle.	ConfidenceHigh	StatusSingle-source via WTOP as of Aug 31, 2026, 11:45 PM UTC
ClaimThe Yankees have a better team ERA than the Angels.	ConfidenceHigh	StatusSingle-source via WTOP as of Aug 31, 2026, 11:45 PM UTC
ClaimThe Boston Red Sox have a record of 74-63.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe Seattle Mariners have a record of 64-73.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe Boston Red Sox lost 16-1 to the Yankees in a weekend game.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimThe Seattle Mariners were swept by the Blue Jays, including a 7-0 loss.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimBoston's lineup received a boost with the return of Roman Anthony.	ConfidenceHigh	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC
ClaimSeattle may promote 21-year-old Lazaro Montes.	ConfidenceMedium	StatusSingle-source via Baton Rouge Advocate as of Sep 1, 2026, 1:46 AM UTC

Transparency & Audit Trail

2 distinct · 2 mastheads · 2 articles consulted: Baton Rouge Advocate, WTOP 23 claims extracted Version 1 Written 2026-09-01