Cal Poly competed in the Great West Conference (GWC). The 2009 Mustangs were led by first-year head coach Tim Walsh and played home games at Mustang Stadium in San Luis Obispo, California. The team finished the season with a record of four wins and seven losses (4–7, 1–3 GWC). The Mustangs were outscored by their opponents 258–303 for the season.
^The official name of Cal Poly is California Polytechnic State University. However, it has been more commonly known as either Cal Poly San Luis Obispo or just Cal Poly since 1947.