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Mattress Mack lays $516K hammer on the Astros to win $13 million at Kalshi

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Cite

Richter, E. (2026, September 29). Mattress Mack lays $516K hammer on the Astros to win $13 million at Kalshi. New York Post. https://nypost.com/2026/09/29/betting/mattress-mack-lays-516k-hammer-on-the-astros-to-win-13-million-on-kalshi/

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

New York Post · collected 2026-09-29 · by Erich Richter

Quick Summary

Jim "Mattress Mack" McIngvale has placed a $516,000 bet on the Houston Astros winning the World Series through prediction market Kalshi, with a potential payout of $13 million. This follows a promotion at his Gallery Furniture store where customers can get their purchases refunded if the Astros win. Mack already has a built-in liability of $4 million from this promotion and projects it could reach around $12 million if the team performs well. Known for backing Houston sports teams, particularly the Astros, he chose Kalshi to manage the bet more flexibly despite Texas not legalizing sports betting.
Written by AI on 2026-09-29, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

Jim "Mattress Mack" McIngvale, owner of Gallery Furniture in Houston, made a high-stakes bet of $516,000 on his beloved Houston Astros to win the World Series at prediction market Kalshi. This bet was intended to cover potential refunds of $4 million from customers who had spent $4,000 or more in exchange for a refund if the Astros won the championship. Despite Mack's optimism, the Astros were swept by the Chicago White Sox in the Wild Card round, resulting in a significant loss for him and his store promotion. The furniture retailer had been marketing this promotion for two months, expecting to triple the initial $4 million liability should the team perform well, but the outcome was far from what he anticipated.

Written for “Mattress Mack Betting Win Loss” on 2026-11-04, grounded in this article and the 1 other(s) covering the same event.

Story

📰 Mattress Mack Betting Win Loss
Entertainment · 2 article(s) covering the same event. See how they differ ↓

Compared with similar articles

This article reads unscored and hedges 3% of its claims. Each row says how that neighbour differs.
New York Post
Hedges 3 of 27 claims Outlet record 66/100
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
30
sentences that state something as happening or true
Uncertain
3%
1 of 30 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
66/100
New York Post's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
2
Entertainment
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-29 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

New York Post · 16794 article(s) · 36 correction(s) detected
Running correction rate · 36 correction(s)

Who wrote this

Erich Richter
90 article(s) here · 1 carrying a prediction
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Also by Erich Richter
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 90 articles by Erich Richter →

Topics

Astros Houston Kalshi The Post the World Series

Subjects

Mack PERSON · 11× Astros ORG · 9× Kalshi ORG · 5× Houston GPE · 3× Texas GPE · 2× The Post ORG · 2× Gallery Furniture ORG · 1× Jim “Mattress Mack” McIngvale PERSON · 1× Mattress Mack PERSON · 1× the Houston Cougars ORG · 1×

Narrative

After marketing for roughly two months an Astros to win the World Series promotion where customers who spend $4,000 or more at his Gallery Furniture store get their purchases refunded if the team wins the Fall Classic, Jim “Mattress Mack” McIngvale has officially put his money on Houston with a new operator.
framing: assertive · carried by 1 article(s) · first seen 2026-09-29
🔮 “We’re projected around $12 million in liability if they keep going and get on a roll; they’ve done it before, we’re happy to jump on the ride and bring our customers with them.”
2026-09-29 · New York Post
Mattress Mack lays $516K hammer on the Astros to win $13 million at Kalshi · assertive framing

Claims (30 extracted, 1 hedged)

Mattress Mack is back — throwing around cash and beds to boot. asserted
Mack → throw → cash
The famous sports bettor and furniture salesman is all in on his beloved and native Astros to win the World Series now that they have officially made the playoffs. asserted
they → win → playoffs
After marketing for roughly two months an Astros to win the World Series promotion where customers who spend $4,000 or more at his Gallery Furniture store get their purchases refunded if the team wins the Fall Classic, Jim “Mattress Mack” McIngvale has officially put his money on Houston with a new operator. asserted
McIngvale → market → operator
Mack tells The Post he has laid $516,000 on the Astros to win the World Series, with a potential payout of $13 million if they do – and he’s gone to prediction market Kalshi to facilitate. “Well, we’ve been running the promotion for a while, so we have some built-up liability already,” Mack tells The Post. asserted
Mack → tell → liability
“Baseball is a very random game, and the Astros have more home runs than anybody” asserted
Astros → have → anybody
The furniture salesman added that he already has a big liability here despite Houston wallowing for much of the season. “We already have $4 million in liability on the promotion,” Mack revealed. asserted
Mack → add → promotion
“We’re projected around $12 million in liability if they keep going and get on a roll; they’ve done it before, we’re happy to jump on the ride and bring our customers with them.” asserted
we → project → them
Mack is a big sports gambler; he previously won the biggest payout in sports betting history in 2022 when he won $75 million on the Astros when they went all the way, though these winnings were not all his and he never actually loses when he makes these bets. asserted
he → win → bets
“It’s very popular with our customers, so we want to have our bases covered. asserted
bases → ’ → customers
We’ve been marketing for the last two months,” he said. asserted
he → market → months
“But it was iffy because we weren’t sure if they were going to do it or not.” asserted
they → go → it
Mack constantly backs the Houston teams, including the Houston Cougars in college basketball, among others, but has had the most success with the Astros. asserted
Mack → back → Astros
Picking Kalshi is interesting for multiple reasons. asserted
Picking → pick → reasons
Kalshi, which operates in Texas, where sports betting is not legal, gives him the flexibility to manage the position as he sees fit, but he should also be getting interest, sometimes as high as five percent, on the money that’s in the account as well. asserted
that → operate → account
“I’ve been aware of Kalshi and made a few wagers on them before. asserted
I → make → them
I had a price in mind for the hedge, and the sportsbooks were about 18/1 after they clinched, and I wanted to get higher than that,” Mack added. asserted
Mack → have → that
“I talked to Kalshi, and they connected me with these market maker guys, and they got me the price of 24/1. asserted
they → talk → 24/1
” “The last time the Astros won, we gave back $74 million,” Mack added. asserted
Mack → win → million
“Some people got refunded $70,000 back. asserted
people → refund → 70,000
We pay them back mostly by check or credit card.” asserted
We → pay → check
Those credit card fees are massive hits; on $13 million in sales via credit card, Mack can expect to pay between $300,000 and $500,000 in fees, which he says he eats. asserted
he → expect → fees
“Most of the time it’s a hedge, but we might come back $500,000 or a million ahead, but we might get killed by the credit card fees,” Mack said. uncertain
Mack → ’ → fees
“As you know, when a local team is involved, that’s what it’s all about mentally, in a challenging retail environment. asserted
it → know → environment
When asked about the convenience of not having to hop on a plane to a casino to wager his money on the Astros to win the World Series, Mack said it was a phenomenal experience. asserted
it → ask → Series
Get the lowdown on the Best USA Sports Betting Sites and Apps - Check out the best sports betting sites and apps Sportsbooks have been trying to get into Texas for nearly a decade, but have been restricted by Senator Dan Patrick, who would need a constitutional amendment, not a bill, to legalize. asserted
who → get → amendment
When asked about the ongoing fight between sportsbooks and prediction markets, Mack added: “I can whine about my competition, or I can put on my big boy britches and go out there and beat ‘em.” asserted
I → ask → em
The Astros have an opportunity to beat ‘em when they host the White Sox on Tuesday for Game 1 of their Wild Card series. asserted
they → have → series
Why Trust New York Post Betting Erich Richter is a brazilian jiu-jitsu blue belt but he has a black belt in MMA betting. asserted
he → trust → betting
During the football season he’s showcased massive profits at The Post in the player prop market the last two seasons. asserted
he → showcase → market
While constantly betting long shots, his return on investment is 30.15 percent since 2022. asserted
return → bet → 2022
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