8/7 UPDATE:
The Cubs have released C-1B Dom Nunez.
8/1 UPDATE:
The Cubs have traded minor league RHPs Manuel Rodriguez and Adrian Sampson (plus ISBP space) to the Tampa Bay Rays for minor league RHP Josh Roberson.
Sampson is a 2023 outrighted Article XX-D minor league player so he was eligible to file for free-agency beginning on the day after the conclusion of the MLB regular season up through 10/15, and both M. Rodriguez and Roberson are eligible to be a Rule 9 minor league 6YFA post-2023 World Series, unless the player is added to an MLB 40-man roster or signs a 2024 minor league successor contract prior to 5 PM (Eastern) on the 5th day after the final game of the 2023 World Series.