Seattle Mariners vs Arizona Diamondbacks Prediction, 6/9/2025 MLB Picks, Best Bets & Odds

Game: Seattle Mariners vs Arizona Diamondbacks

Date: Monday, June 9, 2025

Location: Chase Field in Phoenix, AZ

TV: DBACKS.TV

Odds/Point Spread: Seattle (-144) Arizona (+120)

Chase Field is the location where the Arizona Diamondbacks (31-31) will meet the Seattle Mariners (32-29) on Monday. The moneyline on this matchup has Seattle at -144 and Arizona opens at +120. The total comes in at 8.5. The pitchers expected to start will be Logan Gilbert and Merrill Kelly.

The Mariners have accounted for 74 two-baggers as a squad and have knocked 81 baseballs out of the park. Seattle has a slugging % of .392 and have struck out 551 times, while taking a walk on 222 occasions. As a team, the Seattle Mariners are compiling 4.4 runs/g, which is 12th in baseball. They have compiled 260 RBI's as well as 488 hits so far this year, and their batting average is at .236. They have racked up 269 runs while holding a team on-base percentage of .318.

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The Mariners are sitting with a team ERA of 3.87 for the year (14th in the league), and they have rung up 489 batters. Mariners pitchers have conceded 66 long balls and 267 total runs (19th in the league). They have walked 188 opposing hitters and their FIP sits at 4.00 as a team over the course of the season. Seattle has conceded 546 base hits (8.9 per 9 innings) as well as 239 earned runs. They have accrued a K/BB ratio of 2.60 and their pitching staff sits with a WHIP of 1.32.

Mariners bullpen pitchers have gone to the mound with players on base 47 times in addition to having 90 appearances in high leverage situations. The relief pitchers have recorded 33 holds so far this year (21st in the league). The Mariners bullpen have a save percentage of 60.0% and have stepped onto the mound in 63 save situations. They have earned 18 saves so far this season and have not converted 12 out of their 30 chances to get a save. The relief pitchers have inherited 51 base runners so far this year with 29.4% of them earned a run for their team. The Mariners have sent 212 relievers to the mound on the year.

The San Francisco Giants have notched a total of 1,667 putouts on the campaign, as well as 541 assists and 25 errors. Their fielding percentage sits at .989 which puts them in 5th in MLB, and have a total of 53 double plays. The Mariners have turned 69.1% of balls hit into play into outs out of 5,001 innings on the diamond, which has them sitting 21st in professional baseball.

Gilbert has pitched in 734 innings and has racked up 755 punch outs during his MLB career. Gilbert (42-31 career win-loss mark) sits with a FIP of 3.50 while he has gone up against 2,959 hitters during his time in the majors. His earned run average is 3.55 (290 ER's allowed) and he has a WHIP of 1.053. He has given up 617 hits (7.6 hits per 9 innings) and has had 156 free passes.

The Diamondbacks have a slugging percentage of .448 and they tally 5.11 runs per game (4th in baseball). They have 121 two-baggers, while taking a walk 229 times as well as putting up 317 runs. Arizona has knocked in 87 home runs over the course of the season to go along with 310 RBIs. They have struck out on 465 occasions (27th in baseball) and have recorded 537 base knocks. The Arizona Diamondbacks have an OBP of .333 and a team batting average of .255 for the year.

The Diamondbacks have a team WHIP of 1.329 and are the owners of a FIP of 4.28 as a squad this year. Their strikeout to walk ratio sits at 8.60 (529 strikeouts vs 208 free passes). They rank 21st in baseball as a pitching staff in total hits given up with 526. They have surrendered 78 dingers and they concede 5.22 runs per 9 innings (24th in MLB). The Arizona pitching staff have surrendered 320 runs on the season while having a team ERA of 4.76 (292 earned runs surrendered).

Arizona bullpen pitchers have an inherited score percentage of 34.9% out of their 63 inherited base runners. Their relief pitchers have stepped onto the mound 60 times in high leverage situations and on 50 occasions with base runners. With 66 save situations, the Diamondbacks have earned 33 holds and also 11 blown saves. They sit at 13th in the league holding a save rate of 64.5%, and they have sent 190 bullpen pitchers to the hill over the course of the season. Arizona has called on relievers to enter the game in 31 save opportunities and they have recorded 20 saves.

The Arizona Diamondbacks have gotten 43 double plays and have a fielding rate of .986 (16th in baseball). The Diamondbacks have 563 assists, 32 errors and have accounted for 1,658 putouts on the season. In 4,974 innings on the field, the Diamondbacks have earned a defensive efficiency of 69.5% (20th in professional baseball).

During his career, Kelly has surrendered 806 base hits while totaling 816 strikeouts in 900 frames. He has surrendered a total of 379 ER's while holding a WHIP of 1.197 and a FIP of 3.7. His K/BB ratio is 3.01 and he has gone up against 3,697 batters in his pro baseball career. Kelly (59-46 career mark) holds a 3.79 ERA while surrendering 8.1 hits per 9 innings.

Who will win tonight's MLB game against the spread or moneyline?

Parlay's Pundit's Pick: Take Arizona (+120) and under 8.5 runs

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