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The Baltimore Orioles (53-31) and Seattle Mariners (47-39) open a 3-game set at T-Mobile Park Tuesday. First pitch is scheduled for 9:40 p.m. ET. Let’s analyze BetMGM Sportsbook’s lines around the Orioles vs. Mariners odds and make our expert MLB picks and predictions for the best bets.
Season series: Orioles lead 2-1
The Orioles won 3 of 4 home games against the Texas Rangers Thursday through Sunday. They wrapped up the series with an 11-2 loss as -169 favorites as the Over (9) hit. Baltimore has won 4 of its last 5 games, after losing 5 straight June 21-25.
The Mariners have lost 4 straight series. They dropped 2 of 3 against the Minnesota Twins in Seattle over the weekend, losing 5-3 as -101 underdogs in Sunday’s finale as the Over (6.5) cashed.
Orioles at Mariners projected starters
RHP Grayson Rodriguez vs. RHP George Kirby
Rodriguez (9-3, 3.72 ERA) makes his 15th start. He has a 1.24 WHIP, 2.7 BB/9 and 9.7 K/9 in 82 1/3 IP.
- Last start: Win, 7 IP, 2 ER, 5 H, 0 BB, 4 K in 4-2 home victory vs. Cleveland Guardians Wednesday
- 2024 road stats: 4-2, 5.35 ERA (38 2/3 IP, 23 ER), 1.47 WHIP, 10.2 K/9 in 7 starts
- Career vs. Mariners: 0-0, 0.00 ERA (6 IP), 1 H, 3 BB, 7 K in 1 start, a 4-3 home loss May 18
Kirby (7-5, 3.35 ERA) makes his 18th start. He has a 0.97 WHIP, 0.8 BB/9 and 8.7 K/9 in 99 1/3 IP.
- Last start: Win, 6 IP, 1 ER, 4 H, 0 BB, 7 K in 5-2 victory at Tampa Bay Rays Wednesday
- 2024 home stats: 5-1, 2.34 ERA (42 1/3 IP, 11 ER), 0.85 WHIP, 10.2 K/9 in 7 starts
- 2024 vs. Orioles: 0-1, 7.50 ERA (6 IP, 5 ER), 9 H, 0 BB, 3 K in 1 start, a 6-3 road loss May 19
- Career vs. Orioles: 1-3, 4.02 ERA (31 1/3 IP, 14 ER), 1.09 WHIP, 6.9 K/9 in 5 starts
Who’s going yard? Here’s a breakdown of today’s best home run props with our top picks. Include the BetMGM bonus code SBWIRE to score a $1,500 first-bet offer.
Orioles at Mariners odds
Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 9:21 a.m. ET.
- Moneyline (ML): Orioles -115 (bet $115 to win $100) | Mariners -105 (bet $105 to win $100)
- Run line (RL)/Against the spread (ATS): Orioles -1.5 (+155) | Mariners +1.5 (-190)
- Over/Under (O/U): 7 (O: -120 | U: +100)
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Orioles at Mariners picks and predictions
Prediction
Mariners 4, Orioles 3
Moneyline
The MARINERS (-105) have won Kirby’s last 5 home starts, and he has allowed a total of just 1 ER over his last 4 at T-Mobile Park. Rodriguez, on the other hand, has given up an average of 4 runs per game in his last 5 road starts.
Seattle has struggled since mid-June (4-8 since June 18), but 3 of those 4 series were on the road and the Mariners are 28-14 at home this season. Look for the AL West leaders to get back on track as the 2nd-place Houston Astros trail by just 3 games in the division.
BET MARINERS (-105).
Run line/Against the spread
Seattle +1.5 (-190) will likely hit, but it’s hard to beat MLB long term laying -190 on 35-cent lines.
PASS. Bet the ML and/or total instead.
Over/Under
The Mariners have scored 4 runs or fewer in 6 of their last 7 games, while the Orioles have put up 2 or fewer in 5 of their last 9.
While Kirby has allowed just 1 ER over his last 26 IP at home, 7 is a key number in MLB totals, so don’t bet this unless you can find a 7.5 at -115 or better.
LEAN UNDER 7 (+100).
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