Justin Verlander & Kate Upton Take Victory Dog Walk After World Series

Who needs champagne and beer ... when you've got Kate Upton and Harley?!

After the Houston Astros beat down the L.A. Dodgers and won the World Series, stud pitcher Justin Verlander went back to the team hotel with his supermodel girlfriend for a romantic post-game stroll.

FYI, Harley is an adorable boxer that Kate rescued roughly 6 years ago -- and she loves him like a child ... so she travels everywhere with him.

Sweet video after a sweet victory -- congrats!!