Hope said an MRI revealed damage, but the severity wasn't clear.
“I believe that regardless of the extent of the injury, that he could have a chance to come back and play this season,” Hope said on his radio show. “We have our fingers crossed it's not as serious as it has been in the past, that he can still come back and play this season.
“I saw him earlier. He was walking OK, but the preliminary reading was there was some damage to the ACL, a potential tear, if you will, but still not 100 percent sure of the final evaluation of it.”
Marve tweeted his determination to return this season, saying “I'm fighting to get back to help Purdue won the Big Ten championship?” He also tweeted his thanks for all the prayers and encouragement he's received.
Marve outplayed starter Caleb TerBush during Saturday's loss at Notre Dame. Marve was 11-for-18 for 119 yards, one touchdown and no interceptions. TerBush was 8-for-19 for 79 yards, one touchdown and two interceptions, although TerBush delivered a clutch 15-yard TD pass to Antavian Edison late in the fourth quarter to tie the score.
TerBush only got that chance because Marve was hurt while being sacked. Marve had the knee wrapped and walked with a limp after the game.
This means Purdue's three-quarterback rotation is down to two. Rob Henry will be TerBush's backup. He didn't play against Notre Dame, but did play in the season-opening victory over Eastern Kentucky.
Purdue hosts Eastern Michigan on Saturday, then has a bye before ending non-conference play with a Sept. 29 game against Marshall. It opens Big Ten action by hosting Michigan on Oct. 6.