No charges will be filed against Oklahoma running back Rodney Anderson, who was accused of rape, Cleveland County District Attorney Greg Mashburn said on Thursday.

A protective order had been issued against Anderson earlier this month when a former OU student accused him of raping her after they met at a Norman bar.

"I want to take this opportunity to announce that [it's] my decision to not pursue any charges against Rodney Anderson resulting from allegations made by Courtney Thornton," Mashburn said. "Norman Police have thoroughly investigated this accusation and the detectives have presented their findings to my office. As is common practice in these types of cases, they presented their investigation to a team of my best prosecutors."

Attorney Derek Chance said the accuser had gone to police only after Anderson had turned away her requests “to pursue a relationship.”

Anderson, a sophomore from Katy, passed a polygraph test last week.

Retired FBI polygraph examiner Bill Brown reported Anderson “denied the allegations” during a three-hour examination and “was not practicing deception in his replies to relevant questions asked of him on this test.”

“My professional training and experience lead me to the conclusion that the results are accurate,” Brown wrote in his report.

"Mr. Anderson is incredibly thankful for the generous and overwhelming outpouring of support he has received from friends and family," Chance said in a statement.

Anderson emerged as a star for the College Football Playoff-bound Sooners this year, leading the team with 960 rushing yards and 11 rushing touchdowns. He has five, 100-yard rushing games in 2017, including 111 against Oklahoma State and 151 against TCU in early November. He also showed flashes as a receiver out of the backfield at times in 2017, most notably against the Horned Frogs when he caught five passes for 139 yards and two touchdowns.

No. 2 Oklahoma plays No. 3 Georgia in the Rose Bowl in a College Football Playoff national semifinal on Jan. 1, 2018.