MLB Best Bets Today: Betting Opportunities and Player Props for July 21

By Noah Lavoie — 22 July 2026 — 5 min read

Tuesday’s Major League Baseball schedule features several intriguing matchups, with the Cincinnati Reds, Miami Marlins, and Detroit Tigers presenting notable betting opportunities. These teams are highlighted due to pitching advantages and recent performance trends.

Cincinnati Reds at Seattle Mariners

The game between the Cincinnati Reds and the Seattle Mariners at T-Mobile Park is scheduled for 9:40 p.m. ET. The Reds are considered a value play, largely due to their starting pitcher, Chase Burns. Burns, a rookie right-hander, has compiled an 11-1 record with a 2.54 ERA, 1.11 WHIP, and 118 strikeouts over 102.2 innings. His performance has positioned him as a key player for the Reds.

Conversely, Seattle will start veteran Luis Castillo. The Mariners hold an overall record of 51-50 and are 30-21 at home, but have a 4-6 record in their last 10 games. The Reds, with a 45-54 record overall and 23-26 on the road, also have a 4-6 record in their last 10 contests. The pitching matchup, particularly Burns’s strong form, is a significant factor in favour of Cincinnati.

Beyond the starting pitchers, the bullpen could also play a role. Seattle may need extended relief innings if Castillo exits early, which would increase the importance of Burns pitching deep into the game for Cincinnati. The Reds‘ lineup, featuring players like Elly De La Cruz and Sal Stewart, has the potential to capitalize on opposing team errors.

Miami Marlins at Houston Astros

The matchup between the Miami Marlins and the Houston Astros offers another interesting betting scenario, with Miami entering as a slight underdog despite holding statistical advantages. The Marlins have a 52-49 overall record, while the Astros are 48-54. On the mound, Miami‘s Tyler Phillips is set to face Houston‘s Tatsuya Imai.

Tyler Phillips has been a consistent starter for the Marlins, with a 3.48 ERA and 1.39 WHIP over 75 innings. In contrast, Tatsuya Imai has a 6.06 ERA and 1.50 WHIP over 52 innings. The Marlins also show a stronger overall statistical profile, with a 4.05 team ERA compared to Houston‘s 4.75 mark. Miami also leads in batting average (.252 vs. .241), on-base percentage (.328 vs. .315), and OPS (.736 vs. .726).

Both teams have a 3-7 record over their last 10 games. However, the Marlins have maintained a better season-long performance, being four games above .500, while the Astros are four games below .500. Miami‘s baserunning, with 104 stolen bases, also provides an additional way to generate runs. The overall consistency of Miami‘s pitching staff and the favourable starting pitching matchup suggest value for the Marlins.

Detroit Tigers at Chicago Cubs

The game featuring the Detroit Tigers against the Chicago Cubs presents an underdog opportunity, with Detroit having a significant pitching advantage. While the Cubs have a superior overall record of 56-44, including 29-21 at Wrigley Field, the pitching matchup favours the Tigers.

Detroit‘s Framber Valdez, a veteran left-hander, holds a 5-6 record with a 4.10 ERA and 1.32 WHIP over 107.2 innings. His underlying metrics are considered stronger than his record indicates, and he is known for generating weak contact. The Cubs will counter with David Peterson, who has struggled this season with a 6.45 ERA and 1.64 WHIP across 82.1 innings. Peterson has allowed frequent baserunners, creating opportunities for the Tigers‘ lineup.

The Tigers are currently playing some of their best baseball, with a 7-3 record over their last 10 games and a 2.10 team ERA, outscoring opponents by 22 runs during this period. Season-long statistics also support Detroit, as they have a 3.59 team ERA compared to Chicago‘s 4.29, and have allowed significantly fewer home runs (98 versus 154). The Tigers also boast a better WHIP (1.21 versus 1.27). The combination of a superior starting pitcher, a stronger overall pitching staff, and recent positive momentum makes Detroit an appealing choice.

In addition to team bets, individual player props are also available. For the Reds vs. Mariners game, Chase Burns is highlighted for his strikeout potential, especially at T-Mobile Park, which is known as a pitcher-friendly stadium. Burns has a 28.6% strikeout rate and a 14.1% swinging-strike rate. Over his last nine starts, he has recorded at least eight strikeouts in four games, and exactly seven strikeouts in three other games. The Mariners also have a high strikeout rate (23.0%), making this a favourable matchup for Burns.

For the Tigers vs. Cubs game, Spencer Torkelson is a notable player prop. Despite an underwhelming season, Torkelson has a career-best hard-hit rate of 40.2% and performs well against left-handed pitchers, with a .354 wOBA and a 50.0% fly-ball rate. This makes his matchup against David Peterson, who has struggled, particularly appealing. Torkelson has been identified for potentially achieving at least two hits, runs, or RBIs.

Another player prop to consider is Bo Bichette for the New York Mets. Despite a challenging first season with the Mets, Bichette has shown signs of improvement, with two two-hit games recently and a low strikeout rate of 9.4% over his past 53 plate appearances. His matchup against Brandon Sproat, who has shown reverse splits and surrendered a .360 wOBA to right-handed hitters, could be beneficial for Bichette.

These matchups offer various opportunities for those following MLB action on Tuesday, July 21.

Source: rotowire.com