Iowa defensive coordinator Norm Parker likely won't be with the ninth-ranked Hawkeyes for Saturday's game at No. 24 Arizona after being hospitalized recently with back pain.
Parker, a diabetic who has been hospitalized several times in recent years, missed last week's game against Iowa State. The 68-year-old coached the second half of the 2009 season from the press box.
Hawkeyes coach Kirk Ferentz said Tuesday that Parker remains under care and "it's doubtful he'll be with us this week."
"It's like a football team," Ferentz said. "We're better off when we have all our best players with us, and Norm is a critical cog of our operation. ... The good news is we've got a veteran staff. Guys work extremely well together. They'll just grab a little bit more of the responsibility. We'll find a way to get it done.
"We'd certainly all prefer that Norm was with us, and we hope he'll be back with us soon."
Parker is in his 12th season as Iowa's defensive coordinator.
Adam Rittenberg covers Big Ten football for ESPN.com. He can be reached at firstname.lastname@example.org.