Ex-USC linebacker Osa Masina -- who was kicked off the football team after he allegedly raped a girl --has pled not guilty to criminal charges.
TMZ Sports broke the story ... Masina was charged with rape and forcible sodomy after he allegedly forced a girl into oral and anal sex during a house party in Utah back in July.
19-year-old Masina -- who was banned from the USC campus -- appeared in front of a judge with his lawyer and entered the plea.
Masina is still under investigation for another alleged rape that happened in an apartment complex near USC over the summer.