The 2015 BYU Cougars baseball team represented Brigham Young University in the 2015 NCAA Division I baseball season. Mike Littlewood acted in his 3rd season as head coach of the Cougars. For the second consecutive year BYU was picked to finish sixth in the WCC Pre-season rankings. After using three stadiums last season, the Cougars played all of their home games at Larry H. Miller Field. The Cougars surpassed expectations in the 2015 season. BYU won 7 of their 9 conference series (losing series only at San Diego and at Pacific), claimed the 3-seed in the WCC Tournament, and lost 0 home series for the season. The Cougars went 0–2 in the WCC Tournament, losing both games in the ninth inning, to finish the season 28–25, 16–11 in conference play.
