Chicago Cubs vs Seattle Mariners | August 21, 2026

Scheduled August 21, 2026 • MLB Ballpark

Chicago Cubs

Seattle Mariners

MLB PREVIEW • August 21, 2026 Featured Matchup

MLB Matchup: Chicago Cubs travels to play Seattle Mariners at MLB Ballpark.

Chicago Cubs

Visiting Side

Seattle Mariners

Home Side

Team Matchup Analysis Tale of the Tape

Circled Game Matchup Projection

71%

Chicago Cubs

29%

Seattle Mariners

Projected Score CHI 4.9 - SEA 3.8

Data Confidence High

Data Used 5 of 6 categories

Chicago Cubs has a stronger overall season performance.
Chicago Cubs has a better road record than Seattle Mariners's home record.
Chicago Cubs boasts a more productive batting lineup.

Chicago Cubs

STAT

Seattle Mariners

58.7% Win % 46.3%

71-50 Overall Record 56-65

35-24 Home Record 33-29

36-26 Away Record 23-36

5.18 Runs / G 3.86

.250 Team BA .228

.757 Team OPS .681

4.07 Team ERA 3.79

1.25 WHIP 1.20

4130 AB (At Bats) 3956

622 R (Runs) 463

1031 H (Hits) 902

202 2B (Doubles) 142

20 3B (Triples) 10

151 HR (Home Runs) 138

585 RBI (Runs Batted In) 447

1726 TB (Total Bases) 1478

513 BB (Walks) 390

1030 SO (Strikeouts) 1022

89 SB (Stolen Bases) 84

.250 AVG .228

.339 OBP .307

.418 SLG .374

.757 OPS .681

610.9 RC (Runs Created) 463.2

.108 BB/PA .088

0.50 BB/K 0.38

3.97 P/PA 3.90

373 XBH (Extra Base Hits) 290

4746 PA (Plate Appearances) 4457

27.4 AB/HR 28.7

4.07 ERA 3.79

1.25 WHIP 1.20

1072.2 IP (Innings) 1059.1

990 H (Hits Allowed) 975

485 ER (Earned Runs) 446

179 HR (HR Allowed) 129

353 BB (Walks Allowed) 300

921 K (Strikeouts) 1018

7.7 K/9 (K Per 9) 8.6

70 W (Wins) 56

50 L (Losses) 64

27 SV (Saves) 26

0.990 FP (Fielding %) 0.986

44 E (Errors) 59

202 DP (Double Plays) 142

4380 TC (Total Chances) 4210

3218 PO (Putouts) 3178

1118 A (Assists) 973

36.4 RF (Range Factor) 35.3

Situational Context Environment

Venue Advantage Host Seattle Mariners plays on familiar turf at MLB Ballpark.

Conditions Conditions: Dome/Indoor

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Circled Game Takeaway

Circled Game Analytical Outlook

Why Chicago Cubs Could Win

Chicago Cubs brings a Team ERA of 4.07 and Batting Average of .250 into the matchup.

Why Seattle Mariners Could Win

Seattle Mariners counters with a Team ERA of 3.79 and Batting Average of .228.

Deciding Factor

The deciding factor will be if Seattle Mariners's superior pitching can dominate the matchup.

Game Details

MLB Ballpark

Dome/Indoor

Attendance

N/A

Closing Odds

Line: NL | O/U: TBD

Pitching & Leaders

🤷

Roster Information Unavailable

Player leaders will be available shortly.

Consensus Pool

Circle Crowd Pick Meter

Live Poll

Chicago Cubs (50.8%) Seattle Mariners (49.2%)

Total Submissions: 35 circles

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