Academic competitions Quiz bowl-style tournaments In 2008, Mission San Jose's National Ocean Science Bowl Team placed first at the regional competition, advancing to the National Competition and placing second behind
Lincoln-Sudbury Regional High School. In 2026, Mission San Jose's Science Bowl team, led by "Chopped Roshan" and "heathens" as they are professionally known, won the 1st place at NSB (National Science Bowl), winning $5,000 for the school's science department.
Speech and debate In 2004–2005, Mission San Jose's
Lincoln-Douglas Debate team (also known as OHSODEF) was ranked first in the country. The team won the National
Tournament of Champions in 2003 and closed out (having two debaters meet in the final round of) the 2004 Fall Classic tournament at the
Greenhill School. In 2018, the team won the
National Speech and Debate Association national championship in
Public forum debate.
Go tournaments Mission San Jose's
Go team took first place at the California High School Go Championships three years in a row (2005–2007). In 2008, the MSJ Go club won first place in the Open Division to become the national champions. In 2010, Mission won first place in Division A at the newly formed Bay Area High School Go Tournament.
Chess tournaments In 2005, the team tied for first place at the CalNorthYouthChess regionals. In 2000, the team took first at the State Scholastic Championship.
Athletics Mission San Jose High School is a member of the
Mission Valley Athletic League (MVAL), which includes high schools in
Fremont as well as
Newark Memorial High School in
Newark, James Logan High School in
Union City, and
Moreau Catholic High School in
Hayward. The league competes within the
North Coast Section of the
California Interscholastic Federation. During the 1978 football season, the Mission San Jose football team won the
North Coast Section 4A Varsity Football Championship and completed an undefeated 12–0 season, becoming the first team in MVAL history to win an NCS football title. The football program was discontinued following the 2015 season. Mission San Jose High School’s
winter guard program has a first-place finish in the Intermediate Division at the 2011
Northern California Band Association Winter Guard Championships. The school’s colors are green and white, and its teams are known as the Warriors. The school previously used imagery associated with
Mission Peak and a feathered arrow logo; these designs were phased out in the late 1990s due to concerns regarding the use of Native American imagery in school mascots. Currently, the school designates the "Mission Man" as a mascot. == Notable alumni ==