Rockies vs. Diamondbacks: Probables, Lineups & Why This Game Could Shift the NL West Race
DENVER, Colorado — The Colorado Rockies (20-32) host the Arizona Diamondbacks (24-30) Friday night in a critical NL West showdown that could redefine the division’s narrative. With both teams battling for playoff positioning, the focus will be on Colorado’s bullpen after a shaky outing yesterday and Arizona’s power bats looking to exploit a potential matchup against a left-handed starter.
Game Essentials
First pitch: 7:10 PM MDT (01:10 UTC May 25) at Coors Field
Regional Sports Network (RSN) | 95.7 The Game (Denver)
Partly cloudy, 72°F (22°C) with light winds. Ideal conditions for Coors Field’s offensive environment.
Starting Pitchers: Left-Handed Duel with High Stakes
Both teams will turn to left-handed starters looking to exploit the Rockies’ struggles against southpaws (team batting .231 vs. LHP this season).
Colorado Rockies
Probable Starter: Michael Lorenzen (4-3, 3.82 ERA, 66.0 IP)
- Lorenzen has allowed just 3 home runs in 12 starts this season
- Struggled with 7 ER in last outing vs. Diamondbacks (May 23)
- Facing Arizona’s dangerous lefty-batted lineup (.289 vs. LHP in 2026)
Arizona Diamondbacks
Probable Starter: Zac Gallen (6-4, 3.45 ERA, 91.0 IP)
- Gallen has thrown 7+ innings in 10 of his last 11 starts
- Holds Diamondbacks to .218 batting average this season
- Could be tested by Colorado’s top power bats (Nolan Arenado, Geraldo Perdomo)
Projected Lineups: Power vs. Precision
Based on yesterday’s performance and recent rotations:
| Position | Colorado Rockies | Arizona Diamondbacks |
|---|---|---|
| LF | Nolan Arenado (3 HR in last 7 games) | Ketel Marte (.500 with 3 HR in last 7) |
| RF | Geraldo Perdomo (RBI single vs. AZ yesterday) | Corbin Carroll (leading NL in HR with 18) |
| DH | Tim Tawa (struggling with 4-for-30 vs. LHP) | Ezequiel Tovar (2-for-3 with 4 RBI in last 5) |
| 1B | Troy Johnston (RBI single vs. AZ yesterday) | Christian Walker (leading NL in OPS .987) |
| C | Hunter Goodman (tagged Marte at home yesterday) | Jake Rogers (1-for-3 with 2 RBI in last 4) |
*Lineups subject to change based on bullpen usage and defensive shifts
Three Storylines That Could Decide the Game
1. Rockies Bullpen: Can They Hold Serve After Yesterday’s Collapse?
Colorado’s bullpen gave up 5 runs in 2.2 innings of work yesterday, including a two-run home run to Ketel Marte. Manager Dave Martinez will need to be strategic with his relievers, particularly:
- Brandon Pfaadt (5.1 IP, 3.18 ERA this season) – Will likely face Arizona’s top bats in the 7th
- Michael Feliz (6.0 IP, 3.94 ERA) – Could be called on in high-leverage situations
- Watch for Geraldo Perdomo in a pinch-hitting role if needed
2. Diamondbacks’ Left-Handed Strength: Can Gallen Contain Them?
Arizona’s lineup is built to exploit left-handed pitching, with:
- Corbin Carroll (.316 vs. LHP, 18 HR)
- Christian Walker (.301 vs. LHP, 16 HR)
- Ketel Marte (.320 vs. LHP, 11 HR)
Gallen’s ability to limit walks (he’s issued just 19 in 91 IP) will be crucial against this patient lineup.
3. NL West Implications: Playoff Picture Hanging in Balance
Both teams are within 5 games of the division lead (Dodgers at 35-19). A Diamondbacks win would:
- Move Arizona to within 4.5 games of first place
- Keep pressure on Colorado’s playoff hopes
- Potentially shift the division race narrative heading into the All-Star break
For the Rockies, a win would keep them in the thick of the race and provide momentum heading into a critical three-game series against the Padres next week.
Coaching Adjustments to Watch
Based on recent trends and matchup analysis:
Rockies Offense
- Small Ball Strategy: Expect more bunts and sacrifices with two runs or less, given Colorado’s struggles with runners in scoring position (.245 batting average RISP this season)
- Defensive Shifts: Likely right-shift against Corbin Carroll and left-shift against Christian Walker
- Pitch Recognition: Nolan Arenado has shown improved pitch tracking this season (78% zone awareness per Statcast)
Diamondbacks Defense
- Bullpen Matchups: Arizona will likely save their best relievers for left-handed batters, particularly in the 6th inning
- Shift Usage: Expect a right-shift against Geraldo Perdomo (.301 vs. Right-handed pitching this season)
- Bunt Defense: Ketel Marte has been excellent defending bunts (3 successful plays in last 10 attempts)
Numbers That Tell the Story
20
Colorado’s record – 10 games behind the Dodgers but within wild card contention
3.82
Michael Lorenzen’s ERA – but he’s allowed just 3 HR in 12 starts
18
Corbin Carroll’s HR – leading the NL and dangerous against lefties
5
Runs Arizona scored in their last meeting with Colorado (May 23)
Injury Report: No Major Changes
Both rosters remain at full strength with no significant injury updates since yesterday’s game. Key players to monitor:
- Sterlin Thompson (COL) – Returned from IL with 4-for-15 record but strong defense at shortstop
- Ildemaro Vargas (AZ) – Day-to-day with oblique strain but likely available for today’s game
- Brandon Pfaadt (COL) – No setbacks after strong performance in last relief appearance
Historical Matchup: Diamondbacks Hold Slight Edge
In their last 10 meetings, Arizona leads the series 6-4. Key historical notes:
- Colorado has won 3 of the last 4 at Coors Field
- Arizona’s last win came in a 5-2 victory on May 23, 2026
- Both teams have combined for 10+ runs in 6 of the last 10 games
Looking Ahead: Critical Series Coming Up
After this game, both teams turn their attention to:
- Rockies: Three-game series vs. Padres (May 27-29) at home
- Diamondbacks: Four-game series vs. Giants (May 26-29) in San Francisco
The All-Star break begins July 15, so these next two weeks will be crucial for both teams’ playoff aspirations.
Key Takeaways
- Left-handed duel: Both starters will look to exploit the other’s struggles against southpaws
- Bullpen pressure: Colorado’s relievers will need to avoid another early collapse
- Power matchup: Arizona’s top bats vs. Colorado’s lefty struggles could decide the game
- NL West implications: Win could significantly alter the division race
- Coaching decisions: Small ball and defensive shifts will be key tactical elements
Follow all the action live on MLB.com or ESPN. For real-time updates, check back with Archysport after the game for our full recap and analysis.
What’s your prediction? Will the Diamondbacks’ power bats overcome Colorado’s home advantage, or will the Rockies’ bullpen turn things around? Share your thoughts in the comments below.
