The only offensive coordinator Kirk Ferentz has ever had at Iowa is leaving the program.
Ken O'Keefe, who has called plays for all 13 years under Ferentz with the Hawkeyes, has left the program for another job, the school announced Friday.
The Quad-City (Iowa) Times reported Friday that O'Keefe informed Hawkeyes players that he will join the Miami Dolphins as wide receivers coach. Joe Philbin, the Dolphins' new head coach, was formerly an offensive line coach at Iowa.
"Ken's work contributed greatly to our program's success during the past 13 years, and more impressively to the growth and development of the young men in our program," Ferentz said in a statement.
O'Keefe was known for developing quarterbacks, including Heisman Trophy runner-up Brad Banks and NFL draft pick Ricky Stanzi. This past season, James Vandenberg threw for more than 3,000 yards and 25 touchdowns in his first year as a starter.
But O'Keefe was also criticized by fans for the team's conservative approach on offense. Iowa ranked sixth in the Big Ten in points scored the past two seasons.
Ferentz will have to replace both coordinators for the first time since arriving in Iowa City. Longtime defensive coordinator Norm Parker retired after the season and hasn't yet been replaced. The school is expected to name Parker's successor sometime next week.
Brian Bennett covers Big Ten football for ESPN.com.