NFL Network's Ian Rapoport reported that Baltimore Ravens rookie offensive guard Nico Siragusa suffered a torn ACL, MCL and PCL on Tuesday.
According to Rapoport, Siragusa was practicing with the first-team offense at the time of the injury.
The Ravens selected Siragusa in the fourth round of the 2017 NFL draft out of San Diego State, and he was expected to potentially vie for a starting job.
Siragusa's injury marks the continuation of what has been a difficult offseason for Baltimore in terms of health and retirement.
Earlier Tuesday, it was announced that tight end Crockett Gillmore was lost for the season due to an MCL injury.