Seattle Mariners vs Colorado Rockies Picks and Prediction for Saturday, September 19, 2026
The Seattle Mariners visit the Colorado Rockies on Saturday at Coors Field, with the opening pitch scheduled for 8:10 PM ET on MLB.TV. Seattle is 71-82, third in the AL West, six games behind Houston, and 6.5 games behind the third and final AL Wild Card position with nine games remaining. The Mariners snapped a three-game losing streak with a 7-2 win over the Los Angeles Angels on Wednesday. Colorado is 56-97, fifth in the NL West, 37 games behind the Los Angeles Dodgers, and has been eliminated from postseason contention with nine games remaining. The Rockies have lost two straight after a 9-2 loss to the San Diego Padres on Thursday. Take a closer look at Saturday’s matchup with our free MLB picks.
Seattle Mariners
Seattle is batting .232 with a .312 on-base percentage and .380 slugging percentage while scoring 624 runs with 175 home runs. Randy Arozarena leads the Mariners with a .278 average, 25 home runs and 75 RBI while adding 23 stolen bases. Dominic Canzone has contributed 22 homers and 69 RBI, while Julio Rodriguez has 21 home runs, 66 RBI and 22 stolen bases. Josh Naylor leads Seattle with 153 hits and is batting .272.
The Mariners have a 4.21 ERA and 1.26 WHIP while holding opponents to a .251 batting average. Seattle has recorded 1,301 strikeouts against only 408 walks, giving the pitching staff a strong strikeout-to-walk ratio. The Mariners have also allowed 186 home runs. Defensively, Seattle has committed 79 errors with a .985 fielding percentage, considerably better than Colorado’s 95 errors.
Injuries: 3B Brendan Donovan is on the 7-day IL, CF Brennen Davis and 3B Will Wilson are on the 60-day IL, and RP Cole Wilcox and SP Emerson Hancock are on the 15-day IL.
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Colorado Rockies
Colorado is batting .254 with a .324 on-base percentage and .417 slugging percentage, scoring 717 runs with 169 home runs. TJ Rumfield leads the Rockies with a .301 average, .393 on-base percentage and 156 hits while adding 15 homers and 69 RBI. Hunter Goodman has supplied a team-high 38 home runs and 81 RBI, while Jake McCarthy is batting .295 with 15 homers, 80 RBI and 30 stolen bases. Colorado has scored 93 more runs than Seattle this season.
The Rockies have struggled badly on the mound, posting a 5.59 ERA and 1.53 WHIP while opponents are batting .289. Colorado has allowed 210 home runs and recorded only 1,040 strikeouts against 509 walks. The defense has committed 95 errors with a .982 fielding percentage. Colorado has also allowed at least eight runs in four of its last five games, including nine runs in each of its last two losses to San Diego.
Injuries: C Hunter Goodman is day-to-day. DH Kris Bryant, SP Jose Quintana and SP McCade Brown are on the 60-day IL, while 2B Willi Castro is on the 10-day IL.
Pitching Matchup
Seattle Mariners - Bryce Miller
Miller is 4-9 with a 4.19 ERA and 1.16 WHIP across 107.1 innings. The right-hander has allowed 90 hits and 20 home runs while recording 106 strikeouts and 34 walks.
Colorado Rockies - Tomoyuki Sugano
Sugano is 12-10 with a 5.49 ERA and 1.36 WHIP across 142.2 innings. The right-hander has allowed 160 hits and 31 home runs while recording 86 strikeouts and 34 walks.
Seattle Mariners vs Colorado Rockies Prediction
Colorado has the stronger offensive numbers, batting .254 compared with Seattle’s .232 while scoring 93 more runs, but the Mariners hold a large advantage on the mound. Seattle owns a 4.21 team ERA and 1.26 WHIP compared with Colorado’s 5.59 ERA and 1.53 WHIP, while Miller also enters with much better numbers than Sugano. The Rockies have allowed at least eight runs in four of their last five games, and Seattle will capitalize on those pitching problems at Coors Field. Final Score Prediction: Seattle Mariners win, 7-5.
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