The Rockies aren't actively trying to trade Stubbs, Groke reports, but the team does have other outfield options in Charlie Blackmon, who made his first All-Star team this season, and Corey Dickerson.
The Rockies acquired Stubbs from Cleveland in December.
According to the report, the Rockies would likely want young pitchers in return for any trade they make.
Stubbs was batting .297 with 10 home runs and 27 RBIs as of July 24.
The Mariners are 53-49 entering Friday's game, and are third in the race for the second American League wild-card spot.
- Sarah Barshop