In this article, we will formulate a Reds vs Mariners Prediction for this MLB matchup on Tuesday, July 21st in the second game of this series. Let’s take a look at the prediction for this MLB matchup.
Seattle Mariners Preview
The Seattle Mariners have a 51-50 record this season and are sitting in the 1st place of the AL West. They have a 30-21 home record and are coming off an 8-0 home win against the Reds. They will face the Rangers and the Dodgers next.
The Seattle Mariners have a .230 batting average this season, .310 OBP and .378 Slugging percentage. Seattle’s pitching staff has a 3.57 ERA and 1.17 WHIP. Randy Arozarena is the team’s best hitter with a .284 batting average. Cole Young leads the team in RBI with 48, while Luke Raley adds a team-high 15 home runs.
Luis Castillo (R) is the projected starting pitcher for the Seattle Mariners, and he has a 3-8 record, 4.93 ERA and 1.37 WHIP.
Cincinnati Reds Preview
The Cincinnati Reds have a 45-54 record this season and are sitting in the 5th place of the NL Central. They have a 23-26 away record and are coming off a 0-8 road loss against the Mariners. They will face the Cardinals and the Guardians next.
The Cincinnati Reds have a .230 batting average this season, .310 OBP and .399 Slugging percentage. Cincinnati’s pitching staff has a 4.60 ERA and 1.44 WHIP. Elly De La Cruz is the team’s best hitter with a .279 batting average. Sal Stewart leads the team in RBI with 70, adding a team-high 20 home runs.
Chase Burns (R) is the projected starting pitcher for the Cincinnati Reds, and he has a 11-1 record, 2.54 ERA and 1.11 WHIP.
Cincinnati Reds @ Seattle Mariners Betting Trends: July 21, 2026
- Probable Starting Pitcher: Luis Castillo Record this season: 3-8 ERA: 4.93
- Home Record: 1-3
- Last 5 against Reds: 0-1
Why the Seattle Mariners will win
- The Mariners have won each of their last six home games against NL Central opponents that held a losing record.
- The Reds have lost seven of their last eight night games against American League opponents.
- The Reds have failed to cover the run line in each of their last eight night games against American League opponents.
- The Mariners have covered the run line in eight of their last nine home games against the Reds.
- The Reds have trailed after 3 innings in four of their last five games against American League opponents that held a winning record.
- The Mariners have led after 5 innings in seven of their last eight night games against the Reds.
- Probable Starting Pitcher: Chase Burns Record this season: 11-1 ERA: 2.54
- Road Record: 5-0
- Last 5 against Mariners: –
Why the Cincinnati Reds will win
- The Reds have won each of their last seven road games against AL West opponents that held a winning record.
- The Mariners have lost three of their last four night games following a win.
- The Reds have covered the run line each of their last seven road games against AL West opponents that held a winning record.
- The Mariners have failed to cover the run line in four of their last five games against NL Central opponents.
- The Reds have won the first inning in five of their last six night games against AL West opponents that held a winning record.
- The Mariners have trailed after 3 innings in four of their last five games as favorites against NL Central opponents.
- The Mariners have trailed after 5 innings in seven of their last eight night games.
Total Runs Facts
- Eight of the Reds’ last nine night games as underdogs have gone UNDER the total runs line.
- Twelve of the Mariners’ last 16 home games against NL Central opponents have gone UNDER the total runs line.
- There has been no run scored during the first inning in each of the Mariners’ last 10 night games.
- There has been at least one run scored in the first inning in seven of the Reds’ last eight road games.
Seattle Mariners Player Prop Facts
- Cal Raleigh has hit at least one home run in four of the Mariners’ last five games against the Reds.
- Luis Castillo has recorded a win in each of his last four appearances against NL opponents that held a losing record.
- Luis Castillo has recorded seven or more strikeouts in each of his five previous appearances with the Mariners as home favorites against NL Central opponents.
- Josh Naylor has recorded at least one hit in each of his last 16 home appearances against NL Central opponents that held a losing record.
Cincinnati Reds Player Prop Facts
- JJ Bleday has hit a home run in three of the Reds’ last four night games against opponents that held a winning record.
- Chase Burns has recorded a win in four of his last five appearances.
- Chase Burns has recorded seven or more strikeouts in eight of his last nine road appearances.
- Elly De La Cruz has recorded at least one hit in 21 of his last 22 road appearances against AL opponents that held a winning record.
- Chase Burns ranks T4th in the league for Wins (11) this season.
Matchup/League Facts
- The Mariners rank 30th in the league for doubles this season (123).
- The Mariners rank 30th in the league for doubles this season (123).
- The Reds rank 29th in the league for hits this season (764).
- The Reds rank 29th in the league for hits this season (764).
Reds vs Mariners Prediction
The Mariners are 7-1 in their last 8 meetings against the Reds, having won their last four meetings in Seattle.
In this Reds vs Mariners Prediction, the Mariners are coming as -115 home favorites. I like the Reds in a bounce-back spot today with their ace on the mound in Chase Burns. He has not been himself lately with 10 earned runs across his last three starts, but he had to face two of the four best offenses in baseball. He has a 5-0 record and 2.75 ERA on the road, while Castillo has been shaky at best this season for the Mariners and has a 1-3 record and 5.26 ERA at home. On top of that, Seattle’s offense has been struggling in their last 10 games and has been even weaker against right-handed pitching. Take the Reds to win this one.