The Columbus veteran suffered the injury in a U.S. Open Cup match this week and will miss the remainder of the 2013 MLS campaign.
Gaven suffered the injury Wednesday night in the 86th minute of a U.S. Open cup third-round game against the Dayton Dutch Lions. He scored a goal and assisted on another prior to the injury to help Columbus to a 2-1 victory and a fourth-round date with the Chicago Fire.
According to a team statement, no timetable has been set for his surgery, but he has definitely been ruled out for the rest of the season.
"Eddie's MRI showed that his ACL was completely torn and that he had bruised his bone in a pattern that was consistent with tearing his ACL," Crew team Physician Dr. Pete Edwards said in a club release. "He didn't have any other obvious meniscal or cartilage injuries, which is good.
"It's much better that this appears to be an isolated ACL injury. He needs to get his knee moving and we need to calm down the inflammation over the next week or two. As soon as his knee is ready for surgery, we'll do that in the next one to two weeks. At this stage of the season, this is a season-ending injury."
The 26-year-old Gaven, in his 11th MLS season, had a Crew-high four assists in league play and was tied for the team lead in goals last season with nine.