Caldwell, shown here with co-captain Jim Hilgenberg, played defensive back for the Iowa Hawkeyes from 1973-76

...City, MO, USA; Texas Longhorns guard Damion James (5) drives downcourt in the game against the Iowa Hawkeyes during the first half of the semifinal round of the O'Reilly Auto Parts College Basketball...

IOWA CITY, IA - NOVEMBER 21: Iowa Hawkeyes head coach Kirk Ferentz looks on from the sidelines during play against the Minnesota Golden Gophers...

...NOVEMBER 14: Quarterback Terrelle Pryor #2 of the Ohio State Buckeyes prepares to pass against the Iowa Hawkeyes at Ohio Stadium on November 14, 2009 in Columbus, Ohio. (Photo by Jamie Sabau/Getty Images...

...14: Tailback Dan Herron #1 of the Ohio State Buckeyes runs with the ball against the Iowa Hawkeyes at Ohio Stadium on November 14, 2009 in Columbus, Ohio. (Photo by Jamie Sabau/Getty Images...

...OCTOBER 31: Head coach Bill Lynch of the Indiana Hoosiers runs on the field against the Iowa Hawkeyes at Kinnick Stadium on October 31, 2009 in Iowa City, Iowa. Iowa defeated Indiana 42-24...

...NOVEMBER 14: Quarterback Terrelle Pryor #2 of the Ohio State Buckeyes passes the ball against the Iowa Hawkeyes at Ohio Stadium on November 14, 2009 in Columbus, Ohio. (Photo by Jamie Sabau/Getty Images...

...14, 2009; Columbus, OH, USA; Ohio State Buckeyes head coach Jim Tressel celebrates after defeating the Iowa Hawkeyes during overtime at Ohio Stadium

...2009; Columbus, OH, USA; Ohio State Buckeyes running back Jordan Hall (29) celebrates after defeating the Iowa Hawkeyes during over time at Ohio Stadium

...2009; Columbus, OH, USA; Ohio State Buckeyes running back Jordan Hall (29) celebrates after defeating the Iowa Hawkeyes during over time at Ohio Stadium

Nov 14, 2009; Columbus, OH, USA; Iowa Hawkeyes quarterback James Vanderberg (16) looks to pass during the second quarter against the Ohio State Buckeyes...

...Buckeyes placer kicker Devin Barclay (23) celebrates after kicking the game winning field to defeat the Iowa Hawkeyes during overtime at Ohio Stadium

COLUMBUS, OH - NOVEMBER 14: Wide receiver Derrell Johnson-Koulianos #15 of the Iowa Hawkeyes tries to haul in a pass as he is defended by Chimdi Chekwa #5 of the...

IOWA CITY, IA - OCTOBER 31: Head coach Kirk Ferentz of the Iowa Hawkeyes watches the action on the field from the sidelines against the Indiana Hoosiers at Kinnick Stadium...

...looks for a receiver during the second half the Northwestern Wildcats 17-10 win over the Iowa Hawkeyes at Kinnick Stadium in Iowa City, Iowa on November 7, 2009