Young injured his knee midway through Thursday's practice.
Young was the team's top nickelback option this season after starting the final 11 games in 2016 as a rookie.
On Thursday, he went down to the ground after intercepting a pass and then bumping into a teammate. Young was visibly in pain and was helped off the field with his arms draped over trainers. He put very little weight on his leg.
Ravens coach John Harbaugh didn't know the severity of Young's injury when he addressed the media Thursday.
"There wasn't much contact at all," Harbaugh said. "We'll see how his knee is."
Young tweeted about his injury and, with the tone, implied he would miss some time.
Coming back stronger than ever, GOD got me, thanks for the prayers— Tavon Young (@Tyoung_NL) June 1, 2017
Young's injury comes during an offseason in which the Ravens focused on strengthening their secondary. Baltimore signed highly regarded safety Tony Jefferson and veteran cornerback Brandon Carr in free agency and drafted cornerback Marlon Humphrey in the first round.
Young graded out as the NFL's No. 26 cornerback by Pro Football Focus last season. He finished with 50 tackles, two interceptions and eight passes defensed (which tied for second on the team).
"It's like what Ozzie [Newsome, general manager] says all the time: 'You need to accrue as much depth to your roster as you can because injuries are going to happen,'" Harbaugh said. "But with that particular bridge, we'll cross when we get there."
Wide receiver Michael Campanaro and defensive lineman Carl Davis also suffered injuries this week and didn't practice Thursday. Campanaro is dealing with a sprained toe that Harbaugh described as a "nuisance." Davis strained a pectoral muscle.