Baltimore Orioles vs Seattle Mariners: Picks, Predictions and Props - 6/18/2026
Use Code WWWC The Baltimore Orioles travel to T-Mobile Park on Thursday afternoon for an intriguing American League clash against the Seattle Mariners. With both teams sending talented young arms to the mound, this matchup promises to be a highly competitive battle dominated by pitching and defense.
Best Available Odds
- Best Moneyline Odds: Seattle Mariners -135, Baltimore Orioles +138
- Best Spread Odds: Seattle Mariners -1.5 (+156), Baltimore Orioles +1.5 (-153)
- Best Total Odds: Over 8.0 (-105), Under 7.5 (+104)
Game Info
- Date: June 18, 2026
- Time: 4:10 PM EDT
- Location: T-Mobile Park, Seattle
Baltimore Orioles vs Seattle Mariners Preview
This afternoon matchup features two teams looking to assert themselves in the American League playoff picture. The Seattle Mariners enter this contest dealing with several key day-to-day injuries to their offensive core, including Julio Rodriguez, Josh Naylor, and Luke Raley. Bettors should verify the starting lineups before the game to see if these key bats are active. Meanwhile, the Baltimore Orioles are also navigating a heavily depleted roster, with key players like Ryan Mountcastle, Jordan Westburg, and Zach Eflin currently sidelined on the injured list. Given the offensive absences and the pitcher-friendly environment of T-Mobile Park, runs will likely be at a premium.
Pitching Matchup
The Baltimore Orioles will start right-hander Shane Baz. Baz has limited experience against the current Seattle roster, holding them to a collective .154 batting average (2-for-13) across 15 career plate appearances. Among individual matchups, Cal Raleigh is 1-for-3 (.333 BA) and Josh Naylor is 1-for-3 (.333 BA) against him, while Julio Rodriguez is 0-for-3 with a strikeout.
The Seattle Mariners counter with right-hander Bryan Woo. Woo has faced the Baltimore hitters more extensively, holding them to a .214 batting average and a 26.7% strikeout rate over 60 plate appearances. While Adley Rutschman has found success against Woo, going 4-for-6 (.667 BA) with a home run, other Orioles have struggled. Taylor Ward is just 1-for-15 (.067 BA) with 6 strikeouts, and Leody Taveras is 2-for-13 (.154 BA) against the Mariners starter.
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Game Thesis: We expect a low-scoring, tight pitching duel dominated by Bryan Woo and Shane Baz. T-Mobile Park historically suppresses offense, and with both lineups missing or risking the absence of key run producers due to injuries, a low-scoring environment is highly anticipated. We expect the Mariners to edge out a close victory, but the strongest edge lies in the game staying under the total.
Best Bet - Total Pick: Under 7.5 (+104)
With T-Mobile Park ranking as one of the most pitcher-friendly venues in baseball and both teams missing critical offensive pieces, the Under 7.5 runs at +104 is our strongest play. Bryan Woo has shown the ability to suppress the Orioles' bats, and Shane Baz should find success against a Mariners lineup that could be missing multiple key starters. Expect a classic afternoon pitchers' duel where runs are incredibly difficult to come by.
Moneyline Pick: Seattle Mariners (-135)
The Mariners hold the edge at home behind Bryan Woo, who has a proven track record of neutralizing key Baltimore hitters like Taylor Ward. While Seattle's lineup is banged up, their pitching depth and home-field advantage should be enough to secure a narrow victory in a low-scoring affair.
Spread Pick: Baltimore Orioles +1.5 (-153)
Because we project a very tight, low-scoring game, taking the Orioles on the run line at +1.5 is a highly logical choice. In a game where offense is scarce, a one-run margin is highly likely, allowing Baltimore to cover the spread even if Seattle secures the straight-up win.
Top Player Prop Picks for Orioles vs Mariners
Taylor Ward Under 1.5 Bases (+130): Ward has struggled immensely in his career matchups against Bryan Woo, managing just one hit in 15 at-bats (.067 BA) while striking out 6 times. Woo's pitching style matches up perfectly to neutralize Ward's power in this pitcher-friendly park.
Cole Young Over 0.5 Hits (-140): Young has been highly consistent at the plate, recording at least one hit in 80% of his last 10 games and 85% of his last 20 games. He represents one of the safest contact bats in the Seattle lineup today.
Dominic Canzone Over 0.5 Hits (-165): Canzone has been in excellent form, hitting safely in 100% of his last 5 games and 80% of his last 10 games. He should continue his hot streak and find a way to get on base this afternoon.
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