The boys’ basketball program has the benefits of stellar coaching; a classic, old-school gym that features a gorgeous, new floor; and a committed school community that regularly fills the gym with energy, excitement, and support for its teams. Each year, the boys' varsity basketball team plays a tough non-league schedule to prepare for the tight competition of the Frontier League. Focusing on skillful execution, teamwork, sportsmanship, and the tenacity to overcome any challenge, students find success and growth on the court, win or lose. About those wins, though: Voit Gym holds memories of countless victories, and Thacher’s boys' basketball history is filled with many league championships and California Interscholastic Federation (CIF) playoff berths.

Recent Thacher graduates have continued playing basketball for the following Division III colleges: Carnegie Mellon, Kenyon, Pomona-Pitzer, and Swarthmore.