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13-21 record · 38.2% wins
Last 30 days · MLB
$1,000 pick on the moneyline
Boston has the lower-ERA probable starter, but Tampa Bay's stronger record and higher scoring average keep this a narrow underdog pick.
The Boston Red Sox visit the Tampa Bay Rays at Tropicana Field on September 18, 2026, with first pitch scheduled for 7:10 p.m. EDT. MLB lists left-handers Ranger Suarez and Ian Seymour as the probable starters for this 2026 MLB matchup.
Suarez brings a 3.33 season ERA, compared with Seymour's 4.27. His two individually dated September outings offer concrete support for Boston: seven scoreless innings at Baltimore on September 4, followed by seven innings of one-run pitching against Kansas City on September 12. Across those appearances, he allowed 10 hits, walked one batter and struck out 11.
That gives Boston a credible starting-pitching argument at +105 on the moneyline. It does not establish how either lineup will perform against a left-hander, since verified batting splits are unavailable.
The Rays are 93-59 and average 4.59 runs per game; Boston is 83-70 and averages 4.39. Those season figures provide a clear counterweight to Suarez's ERA advantage.
Seymour also enters after a strong September 12 appearance against Houston: six innings, four hits, two earned runs, one walk and 10 strikeouts. His September 6 outing at Texas was shorter and rougher, with four runs, three earned, and two home runs allowed in three innings.
Boston has additional uncertainty. Aroldis Chapman is listed day-to-day with lat tightness, and Willson Contreras left September 17 after being hit by a pitch. Neither report establishes their availability for this game.
The lean is Boston Red Sox moneyline (+105), with low confidence and a 4-3 Boston projection. Suarez's season run prevention and the two cited September starts narrowly outweigh Tampa Bay's team advantages in this assessment.
That projection falls below 7.5, but it is insufficient grounds to recommend under 7.5 (-125). Without confirmed lineups, handedness splits or bullpen workload details, the scoring forecast remains fragile.