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MLB · Fri, Sep 18 · 8:10 PM

Mariners at Rockies

O/U 10.5 · RL Mariners -1.5 · Coors Field

GARY'S PICK
Rockies Moneyline
MLBvs Mariners· +156

Rockies
Moneyline

+156 · LOST · SEA 5 · COL 4

Mariners

The pick & result

Published pick
Rockies ML +156
Published odds
+156
Result
Lost
Final score
5-4

Odds are the American price printed with this pick, not a current offer. Wins, losses and pushes remain on the public record; a missing grade is not a win.

The line

BETRIVERS · 18 moves
MarketOpened
Sep 18 9:00 AM
Close
Sep 18 8:01 PM
Move
SPREADMariners -1.5 (-114)Mariners -1.5 (-118)Price
TOTAL10.5 (-115)10.5 (-115)Holds
MONEYLINEMariners -177Mariners -180−3
Every move, in order ›
WhenSpreadTotalMoneyline
OPENSep 18 9:00 AMMariners -1.5 (-114)10.5 (-115)Mariners -177 · Rockies +145
Sep 18 11:00 AMMariners -2 (-105)10.5 (-118)Mariners -195 · Rockies +160
Sep 18 12:24 PMMariners -1.5 (-120)10.5 (-107)Mariners -190 · Rockies +160
Sep 18 1:20 PMMariners -1.5 (-114)10.5 (-117)Mariners -180 · Rockies +148
Sep 18 3:21 PMMariners -2 (+100)10 (-129)Mariners -186 · Rockies +155
Sep 18 3:31 PMMariners -1.5 (-122)10.5 (-108)Mariners -186 · Rockies +155
Sep 18 3:45 PMMariners -1.5 (-120)10.5 (-114)Mariners -182 · Rockies +150
Sep 18 4:10 PMMariners -1.5 (-118)10.5 (-115)Mariners -182 · Rockies +150
Sep 18 4:30 PMMariners -1.5 (-121)10.5 (-110)Mariners -190 · Rockies +155
Sep 18 4:41 PMMariners -2 (-103)10.5 (-118)Mariners -190 · Rockies +155
Sep 18 5:40 PMMariners -1.5 (-120)10.5 (-113)Mariners -186 · Rockies +155
Sep 18 5:40 PMMariners -1.5 (-120)10.5 (-113)Mariners -186 · Rockies +155
Sep 18 5:54 PMMariners -2 (-103)10.5 (-117)Mariners -190 · Rockies +160
Sep 18 6:21 PMMariners -2 (-104)11 (-108)Mariners -195 · Rockies +160
Sep 18 6:27 PMMariners -2 (-108)11 (-115)Mariners -200 · Rockies +165
Sep 18 6:41 PMMariners -2 (-106)11 (-121)Mariners -195 · Rockies +160
Sep 18 6:54 PMMariners -2 (-103)11 (-112)Mariners -190 · Rockies +155
Sep 18 7:28 PMMariners -1.5 (-120)11 (-117)Mariners -180 · Rockies +150
CLOSESep 18 8:01 PMMariners -1.5 (-118)10.5 (-115)Mariners -180 · Rockies +150

The read

Friday night in Denver, thin air and a 10.5 total, and the market has decided this one is settled on the marquee: Bryan Woo's 3.88 against Gabriel Hughes and his 0-8. I think that's exactly backwards for this ballpark. Look at the contact each man actually allows. Hughes has given up a 5.3% barrel rate and 29.9% hard-hit contact. Woo has given up 7.1% barrels and 42% hard-hit. Hughes' xERA is 3.77 against a 6.37 ERA — the market is paying full freight for a fragile number built on sequencing, and paying a premium for Woo's clean one. Then stack the venue on top: Woo's GO/AO is 0.70, a fly-ball lean, and the reported split has him at 2.36 at home versus 5.23 on the road. Hard fly-ball contact at 5,280 feet in a 1.28 park is the worst possible fit, and his best swing-and-miss pitch is a sweeper — the pitch class altitude flattens.

The contact profiles right now reinforce it. Over the last three games Colorado is averaging a 16.2-degree launch angle with a 43.2% sweet-spot rate, a .540 xSLG, and just a 19.4% whiff rate — air contact, in play, in a park that pays for it. Seattle has more raw thump (8.1% barrels, 45.9% hard-hit) but a 7.5-degree average launch angle and a 27.5% whiff rate. That's a lineup pounding the ball into the ground and missing. Handedness helps Colorado too: Woo allows a .686 OPS to lefties versus .557 to righties, and Hughes shows essentially no split (.756 to lefties, .790 to righties), so Seattle's left-handed stack gains nothing structural. Rumfield has been Colorado's steadiest bat with traffic at .341 and a .939 OPS with runners in scoring position.

The best argument against me is Colorado's bullpen: 7.26 ERA, 1.63 WHIP in tracked games, with Agnos burning 57 pitches over three innings yesterday. That's real, and Hughes won't go long. I'm taking it anyway because Feltner sits two days back with 9 scoreless relief innings and 11 strikeouts to soak up length, and because Seattle's pen is no fortress either — their closer has blown 10 saves in 37 chances. At Coors, nobody's lead is safe. At +156 I'll take the live dog.

The research

The dated measurements the app shows under this card — observations with their sample and source, not predictions.

STARTER FORM

  • Bryan Woo: 0.45 ERA over his last 3 starts

    0.45

    Bryan Woo has a 0.45 ERA with 1 earned run and 21 strikeouts over 20 innings in his last three starts. That ERA is 3.43 runs below his 3.88 season mark entering Seattle at Colorado.

BALLPARK

  • At Coors Field, Gabriel Hughes pitches to a 3.81 ERA

    3.81

    Hughes has a 3.81 ERA in 28.1 innings over six games at Coors Field against 8.71 across a 31.0-inning baseline elsewhere, with hitters at .229 in the park. The halves are similar in size but both thin, and the home mark rests on six outings.

TEAM RECORD

  • Rockies 2-6 in Gabriel Hughes's last 8 starts

    2-6

    Colorado is 2-6 in Gabriel Hughes's last eight starts this season, with Hughes going tonight against Seattle. Only the team result is supplied for those eight games.

REGRESSION

  • TJ Rumfield: .301 AVG vs .264 xBA

    .264

    TJ Rumfield's .301 average comes against a .264 expected (xBA) on 600 plate appearances. His wOBA sits at .375 against a .337 expected (xwOBA). Statcast grades the quality of his contact rather than the results, and the expected marks sit below what he has actually posted.

All research from this day

About this analysis

Who made it
Gary AI, an AI sports-analysis product operated by Gary A.I. LLC. No human reviewer is claimed unless one is explicitly named.
Published data
Daily picks first stored September 18, 2026 at 3:37 PM ET.
Odds record
The pick receipt shows the price printed in the published ticket. The matchup market and line ladder provide separate market context. Stored sportsbook sources: fanduel, fanatics, caesars, draftkings, betmgm, betrivers.
Accountability
Read the editorial standards, source policy, and corrections process.

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