Arizona Diamondbacks at Seattle Mariners odds, picks and predictions

Analyzing Saturday’s Arizona Diamondbacks at Seattle Mariners odds and lines, with MLB expert picks, predictions and best bets.

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The Arizona Diamondbacks (12-15) and Seattle Mariners (14-12) play the 2nd game of a 3-game series at T-Mobile Park Saturday. First pitch is scheduled for 9:40 p.m. ET (FS1). Let’s analyze BetMGM Sportsbook’s lines around the Diamondbacks vs. Mariners odds and make our expert MLB picks and predictions for the best bets.

Season series: Mariners lead 1-0

The Diamondbacks, who were -124 favorites, lost 6-1 in the series opener Friday with the Under (7.5) hitting in Seattle. Arizona has lost back-to-back games and 7 of 11.

RF Mitch Haniger hit a grand slam in the 6th inning for the Mariners, who cashed as +115 underdogs. Seattle has won 2 straight games and 8 of 10.

Diamondbacks at Mariners projected starters

RHP Slade Cecconi vs. RHP George Kirby

Cecconi (1-0, 3.00 ERA) makes his 2nd start. The rookie allowed 2 earned runs on 2 hits and 0 walks with 3 K’s in 5 1/3 innings in his season debut, a 5-3 road victory over the San Francisco Giants Sunday.

  • Career road stats: 1-0, 3.63 ERA (17 1/3 IP, 7 ER), 0.98 WHIP in 3 starts and 1 relief appearance
  • Has never faced Seattle before

Kirby (2-2, 5.33 ERA) makes his 6th start. He has a 1.30 WHIP, 1.1 BB/9 and 9.2 K/9 in 25 1/3 innings.

  • Last start: No-decision, 5 IP, 0 ER, 5 H, 1 BB, 7 K in 2-1 loss in 10 innings at Colorado Rockies Sunday
  • 2024 home stats: 2-1, 5.51 ERA (16 1/3 IP, 10 ER), 1.16 WHIP in 3 starts
  • Has never faced Arizona before

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Diamondbacks at Mariners odds

Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 11:40 a.m. ET.

  • Moneyline (ML): Diamondbacks +125 (bet $100 to win $125) | Mariners -155 (bet $155 to win $100)
  • Run line (RL)/Against the spread (ATS): Diamondbacks +1.5 (-165) | Mariners -1.5 (+140)
  • Over/Under (O/U): 7.5 (O: +100 | U: -130)

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Diamondbacks at Mariners picks and predictions

Prediction

Mariners 5, Diamondbacks 2

Moneyline

The Mariners (-155) will likely win, but I prefer taking the plus odds on their run line.

PASS. Bet the run line and/or total instead.

Run line/Against the spread

While the Mariners have won 8 of their last 10 games straight up, they’ve also been blowing teams out. Ten of their last 11 victories have been by multiple runs, while Arizona’s last 6 losses have all been by 2 or more.

Kirby has allowed 2 or fewer runs in back-to-back starts. He should be able to keep the struggling Diamondbacks in check for 5+ innings while the Seattle offense goes to work against Arizona’s rookie starter.

BET MARINERS -1.5 (+140).

Over/Under

While Kirby has allowed 2 runs or fewer in 3 of his 5 starts this season, I do worry about Seattle’s offense putting up a lot of runs early against Ross. Arizona has scored a total of just 2 runs over its last 2 games, so I would lean Under in this spot; however, 7.5 is a little low for my liking.

LEAN UNDER 7.5 (-130).

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Arizona Diamondbacks at Seattle Mariners odds, picks and predictions

Analyzing Friday’s Arizona Diamondbacks at Seattle Mariners odds and lines, with MLB expert picks, predictions and best bets.

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The Arizona Diamondbacks (12-14) and the Seattle Mariners (13-12) play Friday in the 1st of 3 games this weekend. First pitch at T-Mobile Park is scheduled for 9:40 p.m. ET (ESPN+). Let’s analyze FanDuel Sportsbook’s lines around the Diamondbacks vs. Mariners odds and make our expert MLB picks and predictions for the best bets.

Season series: 1st meeting; Seahawks won 2-1 last season

Arizona is onto their final series of a 10-game road trip, which began with a 5-0 loss at San Francisco April 18 and watched the D-back flip-flop wins and losses since, going 3-4. LF Lourdes Gurriel Jr. raised his batting average to .300 after going 10-for-24 (.417) over his last 5 games and is tied with 2B Ketel Marte for the team lead in HRs (5).

Seattle is in 1st place by a half game in the AL West after winning 7 of last 9, including 2 of 3 midweek at Texas in Arlington. After a slow start to the season, CF Julio Rodriguez has turned it up a notch at the plate with 6 multi-hit games in his last 8 games. Plus, his 7 SBs are tied for 3rd most in the AL.

Diamondbacks at Mariners projected starters

RHP Zac Gallen vs. LHP Emerson Hancock

Gallen (3-1, 3.00 ERA) makes his 6th start. He has a 1.30 WHIP, 2.7 BB/9 and 10.7 K/9 in 27 innings.

  • Allowed season-high 5 ER on 9 H (2 HR), 1 BB in 5 IP in 7-3 loss at San Francisco Saturday in last start
  • Sports career 3.65 ERA on the road (340 1/3 IP, 138 ER) in 60 starts vs a 2.77 home ERA (354 IP, 109 ER) in 60 starts

Hancock (2-2, 6.10 ERA) makes his 5th start. He has a 1.26 WHIP, 1.3 BB/9 and 6.5 K/9 in 20 2/3 innings.

  • Originally drafted by Arizona in 2017 out of high school in 38th round but did not sign
  • Had 11.42 ERA after first 2 starts of season but recorded back-to-back quality starts, including 1-run ball over 6 innings in last outing, a 10-2 win vs. Colorado Rockies at Coors Field Sunday

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Diamondbacks at Mariners odds

Provided by FanDuel Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 4:37 p.m. ET.

  • Moneyline (ML): Diamondbacks -130 (bet $130 to win $100) | Mariners +110 (bet $100 to win $110)
  • Run line (RL)/Against the spread (ATS): Diamondbacks -1.5 (+130) | Mariners +1.5 (-156)
  • Over/Under (O/U): 7.5 (O: -105 | U: -115)

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Diamondbacks at Mariners picks and predictions

Prediction

Arizona 4, Seattle 3

Moneyline

BET ARIZONA (-130).

Entering Friday, Seattle had the highest team K% in baseball (27.6%) and Gallen has at least 6 K’s in each of his last 4 starts. The Mariners have also hit the least number of doubles, and C Cal Raleigh who leads the team in HRs (6) may have cooled off offensively after having to undergo an emergency dental procedure Wednesday.

Run line

PASS.

Seattle +1.5 (-156) is the hotter team coming into this one, and it’s at home. My lean would be to take the run and a half if I had to make a play.

Over/Under

BET UNDER 7.5 (-115).

MLB Park Factor calculates T-Mobile Park to produce the least amount of runs per game. Plus, Hancock has pitched much better lately, so this could turn into a bit of a pitchers’ duel. Only 5 pitchers out of 121 who have gone at least 20 innings this year have a lower BB% than Hancock (3.3%), so it’s unlikely the D-backs will generate much traffic on the basepaths.

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For more sports betting picks and tips, check out SportsbookWire.com and BetFTW.

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