American professional football player Forrest Gregg of the Green Bay Packers lets out a victory roar from the sidelines while covered in mud during a game against the San Francisco 49ers, Kezar Stadium, San Francisco, December 10, 1960. The Packers won 13 to 0. Gregg played for Green Bay from 1956 to 1970. (Robert Riger/Getty Images)

Forrest Gregg, Green Bay Packers, Dec. 13, 1966. (AP Photo)

Green Bay Packers offensive lineman, Forrest Gregg (75), who briefly retired from playing duties, sits on bench as defensive unit works in exhibition game against Pittsburgh Steelers in Green Bay, Wisconsin at night on Saturday, Sept. 8, 1969. Gregg was reactivated last week. He is flanked by Dick Himes, left, and Dave Hampton. (AP Photo/Paul Shane)

Forrest Gregg of Green Bay Packers, 1964. (AP Photo)

Green Bay Packers defensive end Willie Davis, tackle Forrest Gregg (75)--both Hall of Famers--and guard Jerry Kramer (64) walk off the field during Super Bowl I, a 35-10 victory over the Kansas City Chiefs on January 15, 1967, at the Los Angeles Memorial Coliseum. (National Football League)

Green Bay Packers Hall of Fame offense tackle Forrest Gregg watches from the sideline during 27-23 win over the Los Angeles Rams on December 18, 1966. (National Football League)

Hall of Fame Green Bay Packers offensive tackle Forrest Gregg (75) in 34-21 loss to the Los Angeles Rams on Oct. 19, 1969 at the Los Angeles Coliseum. (National Football League)

Green Bay offensive tackle Forrest Gregg, a cast securing a broken finger on his right hand, watches the defense work in Green Bay, Wisconsin on Dec. 12, 1969. Being on the sideline is especially difficult for Gregg, because when his unit isn't on the field the other side can score. (AP Photo/Paul Shane)

Green Bay Packers tackle Forrest Gregg (75) of the West watches from the bench against the East in the 1967 NFL Pro Bowl at the Los Angeles Memorial Coliseum on January 22, 1967 in Los Angeles, California. The East defeated the West 20-10. (National Football League)

Cleveland Browns head coach Forrest Gregg in 1977. (National Football League)

Cincinnati Bengals head coach Forrest Gregg tries to get the attention of some of his players during practice at Riverfront Stadium in Cincinnati, Jan. 6, 1983. The defending AFC champions are preparing for the playoff game with the New York Jets in Cincinnati. (AP Photo/Al Behrman)

Forrest Gregg of the Cincinnati Bengals answered numerous phone calls after being named as the new head coach of the Green Bay Packers, in Cincinnati, Dec. 24, 1983. Gregg signed a 5-year contract with full control of the team. (AP Photo/David Kohl)

Forrest Gregg, Cincinnati Bengals coach, smiles for newsmen during interviews at the team's hotel in Troy, Mich., Jan. 19, 1982. The Bengals will face the San Francisco 49ers in Super Bowl XVI on Sunday. (AP Photo/Ed Reinke)

Cincinnati Bengals coach Forrest Gregg lowers his head and turns from the field as his team is defeated 17-7 by the Cleveland Browns, Sept. 16, 1983. (AP Photo)

Cincinnati Bengals head coach Forrest Gregg makes an "O" with his arms to direct the crew filming practice session to film the offense at work in Cincinnati, Nov. 19, 1982. The Bengals worked out at Riverfront Stadium in final preparation for a match-up against the Philadelphia Eagles on Sunday. (AP Photo/Ed Reinke)

Cincinnati Bengals head coach Forrest Gregg is surrounded by sports writers as he holds a news conference in Cincinnati to recount his team's 27-7 win over the San Diego Chargers for the AFC title, Jan. 11, 1982. The Bengals will now meet the San Francisco 49ers in the Super Bowl. (AP Photo)

Former Green Bay Packer Forrest Gregg, left, and Bart Starr chat, just before the Wisconsin Pro Football Writers dinner at a Milwaukee hotel at night on Sunday, Jan. 9, 1975. Both Gregg and Starr are rookie head coaches. Greg has been name coach of the Cleveland Browns and Starr is the new Packers coach. (AP Photo)

Old friends and former teammates Bart Starr, left, and Forrest Gregg meet, Saturday, Sept. 5, 1977 at midfield in Green Bay, Wisconsin, before the Green Bay Packers faced the Cleveland Browns in a pre season contest. Starr now the head coach of the Packers and Gregg the head coach of the Browns were teammates on the Packers during the glory years in the '60s. Both were inducted into the NFL Hall of Fame together this year. The Browns defeated the Packers 19-14 in the pre season game. (AP Photo/Steve Pyle)

Cincinnati Bengals coach Forrest Gregg is carried off the field by jubilant players and fans after the Bengals defeated the San Diego Chargers in the AFC Championship playoff game in Cincinnati, Ohio, Jan. 10, 1982. The win gives the Bengals their first Super Bowl position. (AP Photo)

Cincinnati Bengals head coach Forrest Gregg gestures as he answers a reporter's question at a news conference at the media headquarters in Dearborn, Michigan, on Friday, Jan. 22, 1982. In the foreground is the football on the Super Bowl XVI trophy. Gregg and his team face the San Francisco 49ers in Sunday's Super Bowl. (AP Photo)

Cincinnati Bengals coach Forrest Gregg ponders his teams fortunes during second half action of the Super Bowl XVI against the San Francisco 49ers on Sunday, Jan. 24, 1982 in Pontiac Silverdome in Pontiac, Michigan. (AP Photo)

Cincinnati Bengals head coach Forrest Gregg waves to the crowd of several thousand fans on Cincinnati's Fountain Square in Cincinnati in afternoon on Monday, Jan. 25, 1982 as the team returned home from the Super Bowl. Gregg and his team got a hero's welcome even though they lost to the San Francisco 49ers 26-21 in Sunday's game. (AP Photo/Ed Reinke)

Cincinnati Bengals head coach Forrest Gregg has a look of concern as he talks with his players during a practice session at Riverfront Stadium in Cincinnati, Jan. 2, 1982. The Bengals are preparing for a playoff game against the Buffalo Bills in Cincinnati. (AP Photo)

Former Green Bay Packers star and present Cleveland Browns head coach Forrest Gregg poses after his induction into the Pro Football Hall of Fame in Canton, Ohio on Saturday, July 30, 1977. (AP Photo)

Hall of Famer Forrest Gregg waves to the crowd after being introduced as a member of the silver anniversary all-time Super Bowl team just before the New York Giants 20-19 victory over the Buffalo Bills in Super Bowl XXV on January 27, 1991 at Tampa Stadium (National Football League)

In this Nov. 14, 2011 photo, Hall of Fame football player Forrest Gregg and his wife Barbara are pictured with Pikes Peak and the Garden of the Gods in the background after an interview where he talked about his battle with Parkinson's disease, in Colorado Springs, Colo. (AP Photo/Ed Andrieski)

In this Nov. 14, 2011 photo, Hall of Fame football player Forrest Gregg poses with the clay model that was used for his bust in the NFL Hall of Fame after an interview where he talked about his battle with Parkinson's disease, in Colorado Springs, Colo. (AP Photo/Ed Andrieski)