Iowa coach Kirk Ferentz has hired his son, Brian, away from the New England Patriots to coach the Hawkeyes offensive line.
Brian Ferentz played for the Hawkeyes from 2002-05. He spent the last four years with the Patriots, serving as tight ends coach last season after having previously worked for the team as a scouting assistant and offensive assistant.
Gronkowski and Hernandez were second and third on the team, respectively, in receptions and receiving yards. Hernandez caught 79 passes for 910 yards and seven touchdowns. Gronkowski's 1,327 receiving yards and 17 touchdowns were both records for tight ends.
The Associated Press contributed to this report.