Diamondbacks vs Mariners Prediction 6/9/25 MLB Picks Today

In this article, we will formulate a Diamondbacks vs Mariners prediction for this MLB game on Monday, June 9, at Chase Field in Phoenix, Arizona. Let’s take a look at the prediction for this MLB matchup.

Seattle Mariners Betting Preview

The Seattle Mariners (33-31, 17-14 Away) went through their worst period of the season, during which they suffered five straight losses. However, the Mariners snapped that negative run with a 3-2 win over the Los Angeles Angels on the road and avoided getting swept. George Kirby took the win after allowing two runs on two hits with a career-high 14 strikeouts and no walks across 7.0 innings of work.

This year, the Mariners average 4.41 runs per game (13th in the MLB) on a .239/.319/.394 triple-slash. When it comes to pitching, the Mariners’ staff has a 3.91 ERA (17th) and 1.31 WHIP (19th). Cal Raleigh leads the Mariners with a .272 batting average, 26 home runs, and 53 RBI this season.

The projected starting pitcher for the Mariners is Emerson Hancock, who is 2-2 in ten starts this season, with a 5.19 ERA and 1.47 WHIP in 50.1 innings.

Arizona Diamondbacks Betting Preview

The Arizona Diamondbacks (31-34, 15-17 Home) were on a four-game winning streak, during which they swept the Atlanta Braves on the road, but then suffered a sweep at the hands of the Cincinnati Reds. In Sunday’s 4-2 defeat, Zac Gallen took the loss after allowing four runs on six hits with five strikeouts and three walks in 6.2 innings.

This season, the Diamondbacks average 4.97 runs per game (4th in the MLB) on a .252/.330/.442 triple-slash. When it comes to pitching, the Diamondbacks’ staff has a 4.86 ERA (25th) and 1.39 WHIP (21st). Eugenio Suarez leads the Diamondbacks with a .236 batting average, 18 home runs, and 48 RBI this season.

Merrill Kelly will take the mound for the Diamondbacks on Monday. The 36-year-old right-hander has a 6-2 record in 13 starts this year with a 3.43 ERA and 0.99 WHIP in 76.0 innings.

Why the Diamondbacks will beat the Mariners

• The Mariners have lost eight of their last nine night games after playing the previous day.
• The Diamondbacks have won five of their last six home games against AL West opponents.
• The Mariners have failed to cover the run line in eight of their last nine road games against teams that held a losing record.
• The Diamondbacks have covered the run line in each of their last four games as home favorites against AL West opponents.
• The Mariners have trailed after 5 innings in four of their last five road games against opponents that held a losing record.

Total Runs Facts

• Each of the Mariners’ last five games as road underdogs have gone UNDER the total runs line.
• Six of the Diamondbacks’ last seven night games against AL West opponents have gone OVER the total runs line.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in seven of the Diamondbacks’ last eight home games against American League opponents.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in six of the Mariners’ last seven road games against National League opponents.

Matchup/League Facts

• The Diamondbacks rank 4th in the league for home runs this season (91).
• The Diamondbacks rank T4th in the league for triples this season (12).
• The Mariners rank 4th in the league for steals this season (63).
• The Mariners rank T26th in the league for triples this season (4).

Diamondbacks vs Mariners Prediction

The Mariners won six of the previous ten H2H encounters, including three of the last four. I am going with the D-backs in this one because of the favorable pitching matchup. Kelly has been in better form than Hancock, who did improve recently, but Kelly registered four quality starts in his last six. Also, Kelly allowed a .182 BA in 44 at-bats against Seattle. Back Arizona to open this series with a W.