PREVIEW Starts 10:10 PM ET · T-Mobile Park
August 21, 2026 · AL West

Chicago Cubs at Seattle Mariners

August 21, 202610:10 PM ETT-Mobile Park
AWAY
Chicago Cubs
40-37
@
HOME
Seattle Mariners
40-39

Lineups

Lineups are usually announced ~90 minutes before first pitch. Check back soon.

Manager comparison

AWAY · CHC
Craig Counsell
Lineup 2.6 R Bunts 0.5 R IBBs 0.6 R
HOME · SEA
Dan Wilson
Lineup 2.3 R Bunts 0.9 R IBBs 1.3 R

Bullpen availability

AWAY · CHC
  • Available 8
  • Limited 0
  • Rest required 0
  • Inactive 0
HOME · SEA
  • Available 7
  • Limited 0
  • Rest required 0
  • Inactive 0

Recent form

AWAY · CHC
5-3 ?2 +17 run diff
??LWWLWLWW
HOME · SEA
4-6 W1 -11 run diff
WLLWLWLLWL

Pitching & bullpen preview

Probable starters and each bullpen's availability load in the sections above — the Cubs and Mariners staffs going in.

Once the game ends, a full pitching and bullpen breakdown appears here: starter lines, the relief sequence and each arm's role, pitch counts, and where the game turned.

Keep reading

How RunsLeft analyzes games

Standard content on this page comes from the MLB Stats API. The pitching analysis describes how the game was pitched — the starter's line, the bullpen sequence and each arm's role (opener, bulk, setup, closer), pitch counts as a fatigue signal, and the leverage context where the game turned. Reliever roles are inferred from how the manager used each arm up to that date. It describes structure and constraints; it does not grade the manager.

Read the full methodology.