The Rainbow Warriors played their home games at Les Murakami Stadium.

Coach Mike Trapasso lead the Rainbow Warriors in his 20th season with the program.

After a strong start, seeing the Warriors nationally ranked, the program finished the season with a 24–26 record.

The 2020 Hawaii Rainbow Warriors baseball team notched an 11–6 (0–0) regular-season record.

The season prematurely ended on March 12, 2020, due to concerns over the COVID-19 pandemic.