The indictment was announced on Wednesday by the office of the Ohio attorney general.
Mr Sills, 25, was indicted by a Guernsey County Common Pleas Court grand jury that accused him of raping a woman and holding her against her will in the eastern Ohio county on 5 December 2019.
Mr Sills allegedly forced a woman to perform oral sex on him for “approximately 20 minutes”, according to a police report obtained by TMZ. He is also accused of removing the woman’s pants and groping her, according to police.
Amid the alleged assault, Mr Sills is accused of telling the woman “she was doing this and was not leaving until she did this”, according to the police report.
It’s not clear if Mr Sills has hired a lawyer to speak on his behalf.
The Eagles are set to play the Kansas City Chiefs in the Super Bowl on 12 February and it remains to be seen if Mr Sills will be on the Philadelphia team’s roster.
The office of the Ohio attorney general said the 2019 alleged rape was reported directly after it took place and that an investigation was launched by the Sheriff’s office in Guernsey County, CNN reported.
Mr Sills is an offensive lineman in his first season in the NFL and joined the Eagles as an undrafted free agent last year.
Court documents show that he has been summoned to appear in court in Ohio, his home state, on 16 February.
“Sills engaged in sexual activity that was not consensual and held a victim against her will. The crime was immediately reported, and the Guernsey County Sheriff’s Office conducted a detailed investigation,” the indictment states.
The Special Prosecutions Section of the Ohio Attorney General’s Office is prosecuting the case, according to NBC News.
Mr Sills played college football at West Virginia and Oklahoma State before joining the Eagles. He has played in one game this season and has been inactive during the team’s two games in the playoffs.
The Independent has reached out to the Eagles for comment.