Rays vs Brewers: How to Make Money Betting This MLB Matchup on Monday

The Tampa Bay Rays and Milwaukee Brewers square off tonight at American Family Field in a matchup that looks bland on paper, but that could play right into our hands for a boring wager on the under. With Nick Martinez taking the mound for the Rays and Kyle Harrison making his Brewers debut for Milwaukee, most wouldn’t assume we’re due for a low-scoring affair… that’s exactly why this game is soaring under the total.

Martinez, the 35-year-old veteran right-hander who signed a one-year deal with Tampa Bay this offseason, brings proven command and efficiency. He posted a 4.45 ERA and 1.21 WHIP over 165.2 innings with the Reds in 2025, relying on a sinker-slider mix that induces weak contact and limits hard contact. While his Grapefruit League numbers were ugly due to a hamstring tweak, his track record against Milwaukee is manageable in small samples, and the Rays’ bullpen—anchored by Kevin Kelly, Cole Sulser, Garrett Cleavinger, and Bryan Baker—has been reliable in limiting damage after early exits. Tampa Bay’s offense, led by a scorching Yandy Díaz (.563 AVG, five RBIs in the last game), Jonathan Aranda (one homer, four RBIs early), and contributors like Jonny DeLuca and Ryan Vilade, has shown contact skills but minimal power through three games. The Rays sit at 1-2 with just one home run as a team, relying on singles and doubles rather than explosive innings.

On the other side, Harrison arrives in Milwaukee via a February trade from Boston as a 24-year-old lefty with electric stuff. His 2025 numbers (4.04 ERA, 3.72 FIP in 35.2 innings split between the Giants and Red Sox) highlight swing-and-miss ability and a plus changeup that plays well against right-handed bats. He already has one strong look against this Rays lineup from last September. The Brewers’ relief corps, featuring Trevor Megill, Abner Uribe, Jared Koenig, and Grant Anderson, has surrendered just one earned run in the early going, turning potential rallies into quick outs.

Milwaukee enters at 3-0 with hot bats from Christian Yelich (one homer, five RBIs), William Contreras, Jake Bauers (one homer), Brice Turang, Joey Ortiz, and Sal Frelick, but the sample remains tiny. The Brewers have averaged nearly 10 runs per game, yet that production has come against lesser pitching. Against a veteran like Martinez who pounds the zone and a young arm like Harrison who generates strikeouts, those lineups face a steeper test. American Family Field plays neutral-to-suppressing when the roof is likely closed on this mild March evening, and historical trends back the under: it has cashed in seven of Milwaukee’s last nine games and five of the last six meetings between these clubs.

Early 2026 also favors pitching across the league, with small-sample offenses still finding timing while starters build innings. The Rays’ team ERA sits north of 6.00, but Martinez caps that damage tonight. Milwaukee’s staff ERA is a crisp 3.33, and Harrison fits seamlessly into a rotation built for ground balls and missing bats. Expect both starters to work deep into the game, with bullpens mopping up efficiently. No blowouts loom—Díaz and Aranda may chip away, Yelich and Contreras could drive in a couple, but extra-base noise stays muted. The total stays comfortably under 8 because two capable arms and steady relief arms control the night while neither lineup has flashed sustained power yet. This is classic early-season pitching dominance in action. Lock in the under; I’ll meet you at the cash counter.