Blue Jays vs Mariners Prediction, Odds & Home Run Pick for Today's MLB Game

Ethan Diamandas - Betting Analyst at Covers.com
Ethan Diamandas • Betting Analyst 6+ years betting experience
Updated: Jul 5, 2026 , 10:58 AM ET • 4 min read

Andres Gimenez and Trey Yesavage show up for Toronto.

MLB

Match starts: 4 hrs
TOR
0 %
SEA
0 %
EXPERT PICK - PROP
Andres Gimenez o0.5  Total Bases (-135) Andres Gimenez o0.5 Total Bases (-135)
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Andres Gimenez Toronto Blue Jays MLB
Photo By - Reuters Connect. Andres Gimenez runs to first base after hitting a single against the Astros.

The Toronto Blue Jays head into the series finale in a get-right spot with Trey Yesavage on the mound against the Seattle Mariners and Emerson Hancock. Toronto’s bats are cold, yet Andrés Giménez is bucking the trend, and he headlines my card on Sunday.

Read on for my Blue Jays vs. Mariners predictions and MLB picks for this Sunday, July 5 matchup.

Blue Jays vs Mariners predictions

Blue Jays vs Mariners best bet: Andres Gimenez Over 0.5 total bases (-135)

Seattle Mariners starter Emerson Hancock is a tricky customer, equally as stingy against righties (.634 opponent OPS) as lefties (.647), but Andrés Giménez is the guy I trust to beat him.

The Toronto Blue Jays shortstop had a big Friday, ripping a key RBI double, and like most of the lineup, he went quiet in Saturday’s blowout loss. I’m betting on the bounceback.

Giménez is Toronto’s hottest hitter over the last seven days, with a .750 OPS and .417 slugging in that stretch. I’d play this until -145 today, which is where I think the value dries up.

If you can grab the current number, lay it with confidence, because Giménez is Toronto’s best bet to spark the offense.

Covers COVERS INTEL: Andrés Giménez owns a .725 OPS in 27 career games against the Mariners, comfortably above his .694 career mark, and he’s shown he can produce in this ballpark with clutch homers here in last year’s ALCS.

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Blue Jays vs Mariners same-game parlay (SGP)

For the same-game parlay, I’m chasing +500 value again. I’ll start with the Blue Jays moneyline at +110. Saturday was rough, but that’s fair value with Trey Yesavage on the mound, especially with Seattle missing Julio Rodríguez. 

Speaking of Yesavage, I like his Over 5.5 strikeouts. He didn’t clear the number last time against the Mets, but he flashed the best command I’ve seen from him all year and worked deep. 

Finally, Vladimir Guerrero Jr. will go Over 1.5 total bases. He profiles well against Emerson Hancock, and even through his struggles, I like his chances to stack a couple of singles, a double, or more.

Blue Jays vs Mariners SGP

  • Vladimir Guerrero Jr. Over 1.5 total bases
  • Blue Jays moneyline
  • Trey Yesavage Over 5.5 strikeouts
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Blue Jays vs Mariners home run pick: Vladimir Guerrero Jr. (+675)

Blue Jays fans know Vladdy isn’t at his best right now, fighting through a slump and a sore back, but on Sunday, the first baseman is Toronto’s best shot to go deep, even if it’s been a statistical long shot all year.

Emerson Hancock lives off a strong, well-located fastball, and Guerrero has been essentially a pure fastball hitter this season, batting .317 against the heater with a .416 slugging mark.

Three of Guerrero’s four homers have come on the fastball, and all four have come on the road, right where he is today. I’d play this until +550 and keep it to a quarter unit.

2026 Transparency record
  • Best bets: 3-1, +1.99 units
  • SGPs: 1-3, +0.19 units
  • HR picks: 0-4, -1.00 units

Blue Jays vs Mariners odds

  • Moneyline: Toronto +110 | Seattle -130
  • Run line: Toronto +1.5 (-190) | Seattle -1.5 (+160)
  • Over/Under: Over 7.5 (+100) | Under 7.5 (-120)

Blue Jays vs Mariners trend

Trey Yesavage owns a 2.22 ERA on the road this season, giving the Blue Jays a live shot as underdogs in Seattle. Find more MLB betting trends for Mariners vs. Blue Jays.

How to watch Blue Jays vs Mariners and game info

Location T-Mobile Park, Seattle, WA
Date Sunday, 7-5-2026
First pitch 5:00 p.m. ET
TV Sportsnet
Mariners starting pitcher Emerson Hancock
(5-4, 3.47 ERA)
Blue Jays starting pitcher Trey Yesavage
(4-3, 3.34 ERA)

Blue Jays vs Mariners latest injuries

Blue Jays vs Mariners weather

Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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Ethan Diamandas
Betting Analyst

Ethan Diamandas is a Toronto-based sports writer and betting analyst with six years in the sports and gaming industry. A Carleton University journalism grad, he pairs a traditional reporting background with an analytical read on MLB betting. He covered the Toronto Blue Jays as both a beat reporter and a feature writer, which gives him a close feel for roster construction, pitching matchups, bullpen usage, and the day-to-day factors that move baseball odds.

His bylines have run in Sports Illustrated, MLB.com, and Yahoo Sports. He also covers boxing and UFC, but baseball is the focus, especially player props, first-five markets, totals, and game-by-game matchup analysis.

On the book side, he leans on bet365 for its deep player-prop menu and FanDuel for consistently competitive odds, with DraftKings reserved for the occasional ambitious parlay. His approach is research-first and patient. He shops lines, waits for real value, and won't force action just because there's a game on the board.

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