Beginning with the start of the 2022-23 academic school year, SFHS returned back to the Midwest Classic Conference.

I St. Francis High School's sports include: baseball, basketball, cross country, football, golf, soccer, softball, swimming, tennis, track and field, volleyball, wrestling, and cheerleading.

The Mariners' cross-town rivals are the Cudahy High School Packers who are also members of the Woodland East.

As of the end of the 2007 season, the St. Francis Mariner football team has enjoyed eight consecutive playoff appearances, including a runner-up finish in the 2004 WIAA Division 4 Championship.

WIAA State Playoff Appearances 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2014, 2015, 2016, 2017, 2018, 2019, 2022 The St. Francis baseball program has been in existence since 1966 and participates in the Wisconsin Interscholastic Athletic Association summer season.