What happened: The Cubs are acquiring Kevin Gausman from the Blue Jays for Brett Bateman and Ty Southisene. Atlanta reportedly sent Anthony Molina to San Francisco for Tyler Mahle. The Dodgers acquired two-time reigning Cy Young winner Tarik Skubal from Detroit.

Why it matters: Gausman gives Chicago the playoff-caliber starter it pursued, while Mahle addresses Atlanta's rotation needs. Skubal joins the two-time defending champions for their bid at a third straight title.

What to watch: More deals could be completed before Monday's deadline, with final terms and prospect returns still shaping the market.