Series opener brings red-hot Phillies to Seattle
The Philadelphia Phillies (73-58) and the Seattle Mariners (62-69) open a three-game interleague series Monday at T-Mobile Park in Seattle, with first pitch scheduled for 9:40 p.m. ET. The Phillies arrive riding a nine-game winning streak, pulling within three games of the first-place Atlanta Braves in the NL East. During the streak, Philadelphia has outscored opponents 64-30, according to the Naples Daily News and York Daily Record.
In Sunday's 6-4 victory over the St. Louis Cardinals, Edmundo Sosa went 2 for 4 with a double, a run, and three RBIs out of the eight-hole, as the Phillies cashed the Over on a 7.5 total at -210.
The Mariners, meanwhile, were on the wrong end of a 19-2 blowout at home to the Chicago Cubs in Sunday's series finale, though they still managed to take two of three from Chicago over the weekend. Randy Arozarena was a bright spot, going 1 for 4 with a walk and a solo home run. The Over (7.5) hit for the sixth consecutive game for Seattle, and the total has gone high in eight of the past nine games since Aug. 14. The Mariners are 5-3 in their past eight games despite allowing 19 or more runs in two of those losses.
The Phillies won the 2025 season series 3-0, while the Mariners took the 2024 series in Seattle 2-1.
Pitching matchup: Wheeler vs. Gilbert
The projected starters are right-handers Zack Wheeler for the Phillies and Logan Gilbert for the Mariners.
Wheeler enters with a 10-4 record and a 2.92 ERA across 22 starts. In his most recent outing, a 6-4 home win over the Miami Marlins on Tuesday, he allowed two earned runs on two hits — including a home run — with four walks and seven strikeouts over five innings in a no-decision. Over his last seven starts, Wheeler is 1-3 with a 4.59 ERA. On the road this season, he has been effective, posting a 6-2 record and a 2.67 ERA in 12 starts. In his lone career appearance against the Mariners, he earned a win on Aug. 4, 2024, tossing eight scoreless innings with nine strikeouts in a 6-0 road victory.
Gilbert carries a 10-7 record and a 3.35 ERA into his 26th start. His last outing was a victory at the Milwaukee Brewers on Wednesday, where he allowed three earned runs on four hits (one home run) with four walks and five strikeouts over five innings. Over his past seven starts, Gilbert is 3-2 with a 3.77 ERA. At home this year, he has a 7-4 record and a 4.01 ERA in 14 starts. Against the Phillies in his career, he is winless in three starts with a 7.50 ERA.
Betting odds and predictions
Sportsbooks have installed the Phillies as slight favorites on the moneyline at -115, with the Mariners at -105. On the run line, Philadelphia is -1.5 at +155, while Seattle is +1.5 at -190. The Over/Under is set at 6.5 runs, with the Over priced at -125 and the Under at +105.
The expert prediction from the outlets is a Phillies 5-3 victory. The recommended moneyline pick is Philadelphia (-115), the run line pick is Philadelphia -1.5 (+155), and the Over/Under pick is Over 6.5 (-125).
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