Diamondbacks vs Rockies: Full Series Preview & Betting Guide (August 14–17, 2025)

The Arizona Diamondbacks are rolling into mid-August with a spark they haven’t shown in months. Fresh off a thrilling series victory over the defending champion Texas Rangers capped by Ketel Marte’s back-to-back ninth-inning heroics the D-backs suddenly find themselves within striking distance of .500 and climbing in the National League West standings.

After Wednesday’s loss by the San Francisco Giants, Arizona sits in third place in the NL West with a 59–62 record, just three games shy of an even .500 mark. And now, they head to Coors Field for a four-game set against the struggling Colorado Rockies a team they recently swept at home.

This is more than just another midseason matchup. For Arizona, this series represents a golden opportunity to keep their momentum alive, make a statement on the road, and put real pressure on the wild-card race. For Colorado, it’s about pride, player development, and trying to play spoiler in front of their home fans.

Why This Series Matters

While neither team is leading the NL West, the Diamondbacks vs Rockies series is far from meaningless. Arizona is only a few hot weeks away from being in serious wild-card contention. With the Rockies sitting at the bottom of the division, the D-backs see this as a chance to stack wins and carry momentum into a challenging late-August schedule that includes series against the Dodgers and Braves.

Colorado, meanwhile, has been mired in pitching struggles all season. Still, Coors Field has a way of leveling the playing field. The thin Denver air can turn even the most modest offense into a slugfest, meaning no lead is truly safe.

Series Schedule & Pitching Matchups

Date	Matchup	Arizona Pitcher	ERA	Colorado Pitcher	ERA
Thu, Aug 14	Game 1	Eduardo Rodriguez (LHP)	5.68	Bradley Blalock (RHP)	7.89
Fri, Aug 15	Game 2	Brandon Pfaadt (RHP)	5.03	Tanner Gordon (RHP)	8.37
Sat, Aug 16	Game 3	Ryne Nelson (RHP)	3.46	Chase Dollander (RHP)	6.35
Sun, Aug 17	Game 4	TBD	—	TBD	—

Recent Form: Arizona Diamondbacks

Record: 59–62
Last 10 games: 7–3
Current streak: Won 5 of last 6

The Diamondbacks are finally showing the offensive spark that carried them to a deep playoff run last year. Marte’s clutch hitting, Corbin Carroll’s speed, and Lourdes Gurriel Jr.’s timely power have been key drivers in August. The bullpen, which had been a glaring weakness earlier in the season, has begun to stabilize thanks in part to Paul Sewald closing games with confidence.

Arizona’s recent sweep of the Rockies at Chase Field was a masterclass in late-inning offense, and they’ll aim to replicate that formula on the road.

Recent Form: Colorado Rockies

Record: 44–77
Last 10 games: 3–7
Current streak: Lost 4 straight

The Rockies’ 2025 campaign has been defined by one thing: pitching woes. Their rotation ERA ranks near the bottom of MLB, and the bullpen hasn’t been much better. Despite this, the Rockies have a few bright spots Ezequiel Tovar continues to develop into a core infielder, Nolan Jones has been providing pop, and Brenton Doyle remains one of the league’s best defensive outfielders.

For Colorado, the goal now is to play spoiler and give their younger pitchers a chance to adjust to big-league hitters.

Coors Field Factor: The Great Equalizer

No discussion of Diamondbacks vs Rockies at Coors Field is complete without acknowledging the altitude. At 5,280 feet above sea level, the thin air means:

Balls travel farther — home runs come in bunches.
Breaking pitches break less — making off-speed stuff harder to control.
Conditioning matters — outfielders chase more deep balls, and pitchers tire faster.

Coors Field aerial view with Rocky Mountains in background

For a team like Arizona, which has a balanced mix of contact hitters and power bats, this environment could be a blessing. For Colorado, it’s both a home-field advantage and a challenge for their already struggling staff.

Game 1: Eduardo Rodriguez vs Bradley Blalock

Rodriguez gets another crack at Colorado after they roughed him up last week for five runs over six innings. While his season hasn’t gone as planned the $80 million signing has struggled with command and defensive lapses behind him he remains capable of shutting down lineups when his changeup is working.

Blalock, meanwhile, has been hit hard in his rookie season. The D-backs tagged him for seven hits and five runs earlier this month, and unless he makes significant adjustments, Arizona’s bats could have a big night.

Edge: Diamondbacks

Game 2: Brandon Pfaadt vs Tanner Gordon

This is a rematch of last Saturday’s lopsided game in Phoenix, where Pfaadt allowed 11 hits but limited the damage to three runs, while Gordon was shelled for 10 earned runs in under five innings.

The key for Pfaadt will be limiting hard contact early. For Gordon, survival might depend on keeping the ball in the park a tall task at Coors Field.

Edge: Diamondbacks (big)

Game 3: Ryne Nelson vs Chase Dollander

Nelson has quietly been Arizona’s most consistent starter in 2025, with a 3.46 ERA and solid command. His ability to pitch to contact and induce ground balls could be crucial in the thin air.

Dollander, one of Colorado’s top prospects, is coming off a strong return from Triple-A, where he limited damage with better pitch sequencing. Still, facing Arizona’s hot bats will be a test.

Edge: Slight to Diamondbacks

Game 4: TBD vs TBD

The finale is up in the air for both clubs, though Arizona may turn to a bullpen game depending on series results. Colorado’s choice will likely depend on their rotation health.

Edge: TBD

Key Offensive Players to Watch

Arizona Diamondbacks

Ketel Marte – Red-hot in August with multiple clutch home runs.
Corbin Carroll – Speed threat who can turn singles into doubles.
Lourdes Gurriel Jr. – Walk-off hero against Texas, hitting for both power and average.

Colorado Rockies

Ezequiel Tovar – Contact hitter with developing pop.
Nolan Jones – Power bat capable of game-changing swings.
Ryan McMahon – Veteran presence with gap-to-gap power.

Head-to-Head Stats (2025 Season)

Team	Wins	Losses	Runs Scored	Runs Allowed
Diamondbacks	6	1	47	29
Rockies	1	6	29	47

Arizona has dominated the matchup this year, winning six of seven meetings, including a recent sweep.

Betting Odds & Predictions

(Odds courtesy of DraftKings as of Aug. 12, 2025)

Series Winner: Diamondbacks (-180) | Rockies (+150)
Game 1 Over/Under: 11.5 runs
Prop Bet to Watch: Ketel Marte to hit a HR (+350)

Given Arizona’s offensive surge and Colorado’s pitching struggles, the Diamondbacks are the clear betting favorite. The over/under is high — as it always is at Coors — but the combination of shaky starters and thin air makes the over appealing.

Series Prediction: Diamondbacks win 3–1

Fan Reactions & Storylines

Arizona fans are buzzing about Marte’s late-game heroics and the possibility of sneaking into the wild-card race.
Rockies fans are divided between wanting wins and wanting better draft positioning.
Social media has been lively with memes about Coors Field turning routine fly balls into “moon shots.”

Frequently Asked Questions

1. Who is favored to win the Diamondbacks vs Rockies series in August 2025?

The Arizona Diamondbacks are the betting favorites, coming off a hot streak and recent sweep of the Rockies.

2. Where is the Diamondbacks vs Rockies August 2025 series being played?

The four-game series will be played at Coors Field in Denver, Colorado.

3. What time do Diamondbacks vs Rockies games start?

Game times vary by day, but most first pitches are scheduled for 6:40 PM local time in Denver.

4. Which pitchers are starting in the Diamondbacks vs Rockies series?

Projected starters include Eduardo Rodriguez, Brandon Pfaadt, and Ryne Nelson for Arizona, with Bradley Blalock, Tanner Gordon, and Chase Dollander for Colorado.

5. How can I watch the Diamondbacks vs Rockies games live?

Games will be televised on regional sports networks and available for streaming via MLB.TV.

Final Outlook

The Diamondbacks vs Rockies series might not be a playoff preview, but it could be a turning point in Arizona’s season. With the NL West race tightening, Arizona can’t afford to drop games to a last-place opponent.

Colorado will look to spoil that momentum, but with their rotation struggling, they’ll need offensive explosions to keep pace. Expect plenty of runs, highlight-reel homers, and the kind of unpredictable chaos that only Coors Field can deliver.