Baltimore Orioles vs Seattle Mariners Starting Lineup — Thursday, Jun 18, 2026

Baltimore Orioles at Seattle Mariners (2026-06-18). Shane Baz vs Bryan Woo at T-Mobile Park.

Shane Baz, starting for the Baltimore Orioles, enters with a season ERA of 4.06 and a WHIP of 1.39 across 82 innings over 14 starts. His strikeout rate stands at 7.35 K/9, but a notable 3.51 BB/9 indicates potential control issues that could lead to baserunners. Baz's recent trend metrics show an upward movement in his ERA, and he has not recorded a quality start in his last five outings, suggesting a current struggle for consistent deep-game efficiency. Looking at his last five starts, Baz has allowed 4, 1, 3, 4, and 4 earned runs, with varying hit totals and an inability to consistently pitch beyond six innings, never exceeding 6.1 innings in this span. This "alternating" performance pattern highlights his fluctuating effectiveness on the mound.

Opposing him is Bryan Woo for the Seattle Mariners, who has compiled a 4.28 ERA and an excellent 1.04 WHIP through 82 innings over 14 starts. Woo demonstrates superior command with a 1.65 BB/9, significantly lower than Baz's, complementing his solid 8.67 K/9. Despite his season ERA being slightly higher than Baz's, Woo's underlying metrics, especially his WHIP and walk rate, suggest more effective pitching. His recent ERA trend is also noted as "up," but his performance includes a robust 66.7% quality start percentage in his last five appearances, indicating a greater ability to provide length and keep his team in games. In his last five starts, Woo has surrendered 2, 0, 1, 3, and 2 earned runs, consistently pitching six or seven innings in four of those starts, reflecting a more stable and reliable presence on the mound. The stark difference in walk rates and quality start percentages between the two right-handers will be a key factor in this matchup.

The Baltimore Orioles' offense has demonstrated a slight statistical edge this season, registering a .724 OPS and accumulating 349 runs. Their lineup features a .242 batting average and a .322 on-base percentage, with 88 home runs contributing to a .402 slugging percentage. This suggests a capable offensive unit, though their 673 strikeouts indicate some susceptibility to swing-and-miss. On the pitching side, Baltimore's staff carries a 4.55 ERA and a 1.40 WHIP, allowing 88 home runs this season, with a 7.79 K/9. This places them in the middle tier for run prevention, often relying on their offense to outscore opponents.

Conversely, the Seattle Mariners' offense has posted a .713 OPS with 317 runs scored, slightly trailing the Orioles. Their batting average is .236, with a .317 OBP and .396 SLG, alongside 96 home runs. While they have hit more home runs, their overall offensive efficiency is marginally lower than Baltimore's. However, Seattle's pitching staff stands out as a significant strength, boasting a strong 3.67 ERA and an impressive 1.19 WHIP. They have allowed 74 home runs and feature an 8.72 K/9, indicating a more dominant and effective group of pitchers. This disparity in pitching prowess suggests Seattle's strategy often revolves around strong pitching performances to limit opponent scoring. Both teams have shown similar recent form, each holding a 4-6 record over their last ten games, indicating neither club is entering this contest on a particularly hot streak or a prolonged slump.