Terrell Owens is adamant he experienced "systemic racism" in the NFL during his time with the San Francisco 49ers ... and he seems to be pointing the finger at coach Steve Mariucci.
The 46-year-old Hall of Famer was explaining to TMZ Sports why he believes he was "blackballed" from the league 9 years ago ... when he made the bombshell allegation.
"I could've still continued to play but because I was outspoken, because of who I was, I wasn't allowed the opportunity."
"Because I was outspoken. Because of who I was and because of some of the coaches that said things behind closed doors and got in the ears of these owners, that's why I wasn't able to really continue on with my career.