The 2023 Cal State Fullerton Titans baseball team represented California State University, Fullerton during the 2023 NCAA Division I baseball season. The Titans played their home games at Goodwin Field. They were led by Jason Dietrich.
The Titans finished 22âÂÂ33 overall, and 14âÂÂ16 in the conference, and they failed to qualify for the 2022 NCAA Division I baseball tournament. It was the program's third consecutive season with a losing streak.
! colspan=2 style="" | Regular season |- valign="top"
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|- align="center" bgcolor="ffdddd" | June 2<br>7:00 PM PST || vs. (2) Texas A&M || (3) || Sunken Diamond, Stanford, California || L 12-7 || Shane Sdao (4-1) || Tyler Stultz (7-5) || None || ESPN2 || 1,906 || - || - |- align="center" bgcolor="ddffdd" | June 3<br>12:00 PM PST || vs (4) San Jose State || (3) || Sunken Diamond, Stanford, California || W 9-5 || Evan Yates (3-2) || Jake White (6-3) || None || ESPN2 || 1,695 || - || - |- align="center" bgcolor="" | June 4<br>12:00 PM PST || vs (1) No. 3 Stanford or (2) Texas A&M || (3) || Sunken Diamond, Stanford, California || || || || || || || - || -
Source: Rankings are based on the team's current ranking in the D1Baseball poll. Parentheses indicate tournament seedings.