Quarterback Braxton Miller practiced a little on Wednesday, but his status for No. 4 Ohio State's game on Saturday against the Cal Bears remains unclear.
"We'll know more (Thursday)," coach Urban Meyer told ESPN. "He's going on the trip and tomorrow's going to be the day we'll find out how much he'll play."
Miller, who suffered a sprained MCL in Saturday's game against San Diego State has been throwing the ball and participating in noncontact drills while wearing a big brace. He also has been receiving daily treatments on his knee.
He has been listed as day-to-day.
Meyer said he is optimistic Miller will be healed sufficiently for the Buckeyes' first road test of the season.
"It's not as sore, it's an MCL so it's a little unstable," Meyer said of Miller's knee. "He's got to get used to that brace."
If Miller is unable to play, fifth-year senior Kenny Guiton will get the call. Guiton replaced Miller after he was injured in last week's game against the Aztecs.
Guiton threw for 152 yards and two touchdowns, and rushed for 83 yards and a score in the Buckeyes' 42-7 victory.
"He's a distributor," Meyer said of Guiton. "He's a manager and he's looked pretty good."