SportsBaseballMLB

Houston Astros vs. Seattle Mariners

$34.8K volume, 24h156 fills · 70 traders · 57 questions

Reported by Polymarket: open interest $73.7K · liquidity $1.18M · 24h volume 71,590 shares

CreatedSep 16, 2026 13:00 UTC
Sep 16, 2026 13:00 UTC
First tradeSep 20, 2026 12:33 UTC
Event startSep 23, 2026 01:40 UTC
Sep 30, 2026 01:40 UTC

Resolves via mlb.com

Part of MLB · daily

Moneyline

Question	Yes	No	24h volume
Houston Astros vs. Seattle Mariners	44.5¢	55.5¢	$18.9K

Totals

Question	Yes	No	24h volume
O/U 7.5	45.5¢	54.5¢	$8.0K
O/U 8.5	37.5¢	62.5¢	$4.6K
O/U 6.5	58.5¢	41.5¢	$1.2K

Spreads

Question	Yes	No	24h volume
Spread -1.5	32.5¢	67.5¢	$1.4K
Spread -1.5	37.5¢	62.5¢	$482.94
Spread -2.5	27.5¢	72.5¢	$51.84
Spread -2.5	21.5¢	78.5¢	$9.46

Nrfi

Question	Yes	No	24h volume
NRFI	47.5¢	52.5¢	$111.42

Team First Five Winner

Question	Yes	No	24h volume
Seattle Mariners	48.5¢	51.5¢	$31.76
Houston AstrosQuiet	35.0¢	65.0¢	—
DrawQuiet	16.5¢	83.5¢	—
(3 of 3 priced)	99.5¢

Team First Five Total

Question	Yes	No	24h volume
1st 5 Innings O/U 4.5	42.0¢	58.0¢	$25.65
1st 5 Innings O/U 6.5	22.5¢	77.5¢	$13.80
1st 5 Innings O/U 2.5Quiet	71.0¢	29.0¢	—
1st 5 Innings O/U 3.5Quiet	56.5¢	43.5¢	—
1st 5 Innings O/U 5.5Quiet	31.0¢	69.0¢	—

Team Inning8 Winner

Question	Yes	No	24h volume
Houston Astros	16.5¢	83.5¢	$1.20
DrawQuiet	41.0¢	59.0¢	—
Seattle MarinersQuiet	18.5¢	81.5¢	—
(3 of 3 priced)	76.5¢

Team Totals

Question	Yes	No	24h volume
Seattle Mariners O/U 1.5Quiet	88.5¢	11.5¢	—
Houston Astros O/U 1.5Quiet	51.5¢	48.5¢	—
Seattle Mariners O/U 2.5Quiet	68.5¢	31.5¢	—
Houston Astros O/U 2.5Quiet	62.0¢	38.0¢	—
Seattle Mariners O/U 3.5Quiet	53.0¢	47.0¢	—
Houston Astros O/U 3.5Quiet	46.5¢	53.5¢	—
Seattle Mariners O/U 4.5Quiet	38.5¢	61.5¢	—
Houston Astros O/U 4.5Quiet	33.5¢	66.5¢	—
Seattle Mariners O/U 5.5Quiet	58.0¢	42.0¢	—
Houston Astros O/U 5.5Quiet	30.5¢	69.5¢	—

Team Inning7 Winner

Question	Yes	No	24h volume
DrawQuiet	60.5¢	39.5¢	—
Seattle MarinersQuiet	18.5¢	81.5¢	—
Houston AstrosQuiet	17.0¢	83.0¢	—
(3 of 3 priced)	96.0¢

Team Inning6 Winner

Question	Yes	No	24h volume
DrawQuiet	59.0¢	41.0¢	—
Seattle MarinersQuiet	20.5¢	79.5¢	—
Houston AstrosQuiet	17.0¢	83.0¢	—
(3 of 3 priced)	96.5¢

Team Inning4 Winner

Question	Yes	No	24h volume
DrawQuiet	58.0¢	42.0¢	—
Seattle MarinersQuiet	21.5¢	78.5¢	—
Houston AstrosQuiet	16.5¢	83.5¢	—
(3 of 3 priced)	96.0¢

Team Inning1 Winner

Question	Yes	No	24h volume
DrawQuiet	56.5¢	43.5¢	—
Seattle MarinersQuiet	23.5¢	76.5¢	—
Houston AstrosQuiet	18.5¢	81.5¢	—
(3 of 3 priced)	99.5¢

Team Inning2 Winner

Question	Yes	No	24h volume
DrawQuiet	49.5¢	50.5¢	—
Seattle MarinersQuiet	22.0¢	78.0¢	—
Houston AstrosQuiet	14.5¢	85.5¢	—
(3 of 3 priced)	86.0¢

Team Inning9 Winner

Question	Yes	No	24h volume
DrawQuiet	49.0¢	51.0¢	—
Houston AstrosQuiet	16.0¢	84.0¢	—
Seattle MarinersQuiet	8.0¢	92.0¢	—
(3 of 3 priced)	73.0¢

Team Inning5 Winner

Question	Yes	No	24h volume
DrawQuiet	48.5¢	51.5¢	—
Seattle MarinersQuiet	21.0¢	79.0¢	—
Houston AstrosQuiet	18.5¢	81.5¢	—
(3 of 3 priced)	87.0¢

Team Inning3 Winner

Question	Yes	No	24h volume
DrawQuiet	49.5¢	50.5¢	—
Seattle MarinersQuiet	21.5¢	78.5¢	—
Houston AstrosQuiet	18.5¢	81.5¢	—
(3 of 3 priced)	86.5¢

Team First Five Spread

Question	Yes	No	24h volume
1st 5 Innings Spread -1.5Quiet	33.0¢	67.0¢	—
1st 5 Innings Spread -1.5Quiet	23.0¢	77.0¢	—

Game Extra Innings

Question	Yes	No	24h volume
Extra InningsQuiet	10.5¢	89.5¢	—

Market details

Category: Sports
Subcategory: MLB
Discipline: Baseball
Series: MLB
Teams: Houston Astros vs. Seattle Mariners

Prices as of Sep 22, 2026 15:31 UTC; volume from on-chain fills over the last 24h. Trading data is ours; event metadata comes from Polymarket. Not affiliated with Polymarket · Not investment advice.

Questions in this fixture