San Francisco 49ers Hall of Fame quarterback Joe Montana, shown here in 1979, his rookie year. (National Football League)

Former NFL quarterback Joe Montana comes out to perform the honorary coin toss before the game between the Dallas Cowboys and the Pittsburgh Steelers in Super Bowl XXX on January 28, 1996 at Sun Devil Stadium in Tempe, Arizona. (AP Photo/Kevin Terrell)

Quarterback Joe Montana in August 1979. (Associated Press)

Neigh Fahnhorst (71) and Joe Montana make the signal as Johnny Davis scores for the San Francisco 49ers during NFC title game action at Candlestick Park in San Francisco, on Sunday, Jan. 10, 1982. (Associated Press)

San Francisco 49ers quarterback Joe Montana carries his bags into the team's hotel in Southfield, suburban Detroit, Mich., Sunday night, Jan. 17, 1982. The 49ers will start practice Monday at the Pontiac Silverdome as they prepare for Super Bowl XVI against the Cincinnati Bengals on Jan. 24. (AP Photo/Paul Sakuma)

San Francisco giants quarterback Joe Montana toys with a football while on the artificial turf of the Silverdome in Pontiac, Mich., on Thursday, Jan. 21, 1982. The team began practice without pads as they entered the final stages of preparation for super Bowl XVI. (Associated Press)

San Francisco 49ers' quarterback Joe Montana is framed by microphones as he holds court during picture day at San Francisco's Candlestick Park, Jan. 15, 1985. Montana will lead the 49ers against the Miami Dolphins in Super Bowl XIX on Sunday in Stanford. (AP Photo/Jeff Reinking)

San Francisco 49ers owner Edward DeBartolo Jr. right, congratulates Coach Bill Walsh, left, and quarterback Joe Montana in locker room at Stanford Stadium on Sunday, Jan. 21, 1985 following their 38-16 Super Bowl XIX win over the Miami Dolphins. (Associated Press)

San Francisco 49ers quarterback Joe Montana (16) jogs off the field after his first game back from major back surgery during an NFL football game against the St. Louis Cardinals on Sunday, Nov. 9, 1986, in San Francisco. (AP Photo/Greg Trott)

San Francisco 49ers quarterback Joe Montana (16) passes during an NFL football game against the St. Louis Cardinals on Sunday, Oct. 18, 1987, in San Francisco. The 49ers won the game, 34-28. (AP Photo/Greg Trott)

San Francisco 49ers former head coach Bill Walsh (left to right) stands with Hall of Famers Dave Wilcox, Joe Montana and Ronnie Lott during an NFL game against the Carolina Panthers Sunday, Sept. 10, 2000 in San Francisco. (AP Photo/Greg Trott)

San Francisco 49ers quarterback Joe Montana raises his helmet toward the crowd as he leaves the field following the team's 55-10 victory over the Denver Broncos in Super Bowl XXIV in New Orleans, La., Jan. 28, 1990. (AP Photo/Lennox McLennon)

San Francisco 49ers quarterback Joe Montana (16) is walking on air after a third quarter touchdown in Super Bowl XXIV, Sunday, Jan. 28, 1990 in New Orleans Montana, who was awarded the MVP trophy for his record-setting performance is congratulated by teammate Guy McIntyre. (AP Photo/Mark Duncan)

San Francisco 49er quarterback Joe Montana reacts after completing to Jerry Rice during the first period of their Super Bowl game with the Denver Broncos in New Orleans, January 28, 1990. (AP Photo/Red McLendon)

Former San Francisco 49ers quarterback Joe Montana, third from left, at his jersey retirement ceremony during halftime of the 49ers-Broncos game on Monday, Dec. 15, 1997 at 3Com Park in San Francisco. To his left are former 49er coach Bill Walsh, and Eddie DeBartolo.(AP Photo/Ben Margot)

San Francisco 49ers Hall of Fame quarterback Joe Montana looks relaxed before a 30-27 victory over the Los Angeles Rams on December 11, 1989, at Anaheim Stadium in Anaheim, California. For the game, Montana threw two 90-plus yard touchdowns to wide receiver John Taylor and lead the 49ers to 20 fourth quarter points, sparking the comeback. (Al Messerschmidt/NFL)

San Francisco 49er's quarterback Joe Montana (center) and wide reciever Jerry Rice (left) stand with the Super Bowl XXIV trophy on January 28, 1990. San Francisco defeated the Denver Broncos 55 to 10. (Al Messerschmidt/NFL)

Joe Montana in action. (Peter Brouillet/NFL)

San Francisco's Joe Montana at full stride for the Super Bowl XXIV game of the San Francisco 49ers vs. Denver Broncos. The 49ers defeated the Broncos 55 to 10 at the Superdome in New Orleans, Louisiana on January 28, 1990. (Al Messerschmidt/NFL)

San Francisco 49ers quarterback Joe Montana (16) warms up before a 21-14 victory over the Tampa Bay Buccaneers on December 19, 1992, at Candlestick Park in San Francisco, California. Montana, who had missed the past two seasons with an elbow injury, would make his comeback (and final appearance for the 49ers) the following week. (Greg Trott/NFL)

San Francisco 49ers Hall of Fame quarterback Joe Montana (16) rolls out during Super Bowl XVI, a 26-21 victory over the Cincinnati Bengals on January 24, 1982, at the Pontiac Silverdome in Pontiac, Michigan. (Al Messerschmidt/NFL)

Quarterback Joe Montana #16 of the San Francisco 49ers throws behind excellent blocking against the St. Louis Cardinals at Busch Stadium on September 18, 1983 in St Louis, Missouri. (Herbert Weitman/NFL)

San Francisco 49ers Hall of Fame quarterback Joe Montana (16) confers with Hall of Fame head coach Bill Walsh during the 1984 NFC Championship Game, a 23-0 victory over the Chicago Bears on January 6, 1985, at Candlestick Park in San Francisco, California. (National Football League)

San Francisco 49ers QB Joe Montana passes in the 49ers 38-16 victory over the Dolphins in Super Bowl XIX on January 20, 1985 at Stanford Stadium in Palo Alto, California. (Al Messerschmidt/NFL)

Quarterback Joe Montana once again leads the San Francisco 49ers to a World Championship, this time against the Cincinnati Bengals at Super Bowl XXIII on January 22, 1989 in Miami. (Al Messerschmidt/NFL)

Kansas City quarterback Joe Montana during game action against the San Francisco 49er's at Arrowhead Stadium in Kansas City, Missouri in 1994. (Peter Aiken/NFL)

Former San Francisco wide receiver Dwight Clark jokes with Hall of Fame quarterback Joe Montana at halftime of the Niners game against the Minnesota Vikings at Monster Park on Sunday, November 5, 2006 in San Francisco, California. (Kevin Terrell/NFL)

Former NFL quarterback Joe Montana walks the red carpet before the NFL Honors awards show at the Mahalia Jackson Theatre on Saturday, February 2, 2013 in New Orleans, LA. (AP Photo/Ben Liebenberg)

Former San Francisco 49er Joe Montana talks about his election to the Pro Football Hall of Fame at a news conference Friday, Feb. 4, 2000 in Honolulu. (AP Photo/Lenny Ignelzi)

Former Notre Dame quarterback Joe Montana addresses the pep rally at Notre Dame Stadium Friday Oct. 14, 2005, in South Bend, Ind. Notre Dame plays No. 1-ranked Southern California Trojans, Saturday. (AP Photo/Joe Raymond)

San Francisco 49ers Hall of Fame quarterback Joe Montana signs autographs at the NFL Pro Bowl, a 15-6 AFC victory on February 7, 1988, at Aloha Stadium in Honolulu, Hawaii. (National Football League)

San Francisco 49ers Hall of Fame quarterback Joe Montana chats with NFL Commissioner Pete Rozelle at the NFL Pro Bowl, a 15-6 AFC victory on February 7, 1988, at Aloha Stadium in Honolulu, Hawaii. (National Football League)

San Francisco 49ers Hall of Fame quarterback Joe Montana (16) at the NFL Pro Bowl, a 16-13 AFC victory on January 31, 1982, at Aloha Stadium in Honolulu, Hawaii. (National Football League)

NFC Hall of Fame quarterback Joe Montana (16) of the San Francisco 49ers prepares to pitch the football back during the NFC's 45-3 victory over the AFC in the 1984 NFL Pro Bowl played on January 29, 1984 at Aloha Stadium in Honolulu, Hawaii. (National Football League)

NFC Hall of Fame quarterback Joe Montana of the San Francisco 49ers looks for an open receiver during the NFC's 16-13 loss to the AFC in the 1982 NFL Pro Bowl played on January 31, 1982 at Aloha Stadium in Honolulu, Hawaii. (National Football League)

Former San Francisco 49ers great Joe Montana at the Hall of Fame Game, a 20-0 49ers preseason loss to the New England Patriots on July 31, 2000, at Fawcett Stadium in Canton, Ohio. Earlier in the day, Montana was inducted into the Pro Football Hall of Fame. (National Football League)

San Francisco 49ers Hall of Fame quarterback Joe Montana (16) signals "touchdown" during Super Bowl XVI, a 26-21 victory over the Cincinnati Bengals on January 24, 1982, at the Pontiac Silverdome in Pontiac, Michigan. (AP Photo/Vernon Biever)

Kansas City Chiefs Hall of Fame quarterback Joe Montana (19) sets up to pass during an NFL game against the San Diego Chargers on October 9, 1994, at Qualcomm Stadium in San Diego, California. (AP Photo/Kevin Terrell)

San Francisco 49ers Hall of Fame quarterback Joe Montana (16) poses with his four Super Bowl rings for his ProLine Profile trading card during a photo shoot in Santa Clara, Calif., April 21, 1992. (National Football League)

Notre Dame's Joe Montana tries to brush off Georgia Techs' Reggie Wilkes on a 6-yard gain in the first quarter of an NCAA college football game at South Bend, Ind. (Associated Press)

Joe Montana, left, Notre Dame Quarterback, and university of Houston quarterback Danny Davis are seen in New York�s Rockefeller center on Wednesday, Dec. 6, 1978. (Associated Press)

Notre Dame's quarterback Joe Montana chats with head Coach Dan Devine in the closing minutes of the Cotton Bowl Classic against the University of Houston in Dallas, TX. (AP Photo/Bill Haber)

San Francisco 49ers quarterback Joe Montana (16), shown with coach Bill Walsh on Jan. 19, 1982 in Pontiac, Michigan as the San Francisco 49ers get ready to meet the Cincinnati Bengals in the Super Bowl XVI game. (Associated Press)

San Francisco giants quarterback Joe Montana toys with a football while on the artificial turf of the Silverdome in Pontiac, Mich., on Thursday, Jan. 21, 1982. (Associated Press)

San Francisco 49ers Hall of Fame quarterback throws a pass to running back Bill Ring for a touchdown during the "Legends of Candlestick" flag football game Saturday, July 12, 2014, in San Francisco. (AP Photo/Eric Risberg)

San Francisco 49ers Hall of Fame quarterback Joe Montana, right, laughs as retired running back Roger Craig, left, carries the ball during a photo shoot at Candlestick Park before a news conference about their upcoming flag football game Wednesday, June 4, 2014, in San Francisco. (AP Photo/Eric Risberg)

San Francisco 49ers' quarterback Joe Montana, center, is shown holding the Lombardi Super Bowl trophy with coach Bill Walsh, left, and 49ers' owner Edward DeBartolo, Jr., in the locker room at Palo Alto, Calif., Jan. 20, 1985. (AP Photo)

Retired San Francisco 49ers quarterback Joe Montana salutes fans during halftime ceremonies July 31, 2000 at the NFL Hall of Fame football game in Canton, Ohio. (AP Photo/Al Messerschmidt)

San Francisco 49ers' quarterback Joe Montana, center, holds a football as he poses for pictures with running back Roger Craig, left, and fullback Tom Rathman during Super Bowl Media Day, Jan. 17, 1989, in Miami. (AP Photo/Al Behrman)

U.S. President George Bush welcomes the Super Bowl champions San Francisco 49ers to the White House as quarterback Joe Montana offers a football to the president in Washington, D.C., Feb. 3, 1989. (AP Photo/Marcy Nighswander)

San Francisco 49ers (left to right) Roger Craig, Ronnie Lott, Jerry Rice and Joe Montana present coach George Seifert with a birthday cake during a press briefing in New Orleans on Jan. 22, 1990. Seifert celebrated his 50th birthday. (AP Photo/Eric Risberg)

San Francisco 49ers quarterback Joe Montana raises his helmet toward the crowd as he leaves the field following the team's 55-10 victory over the Denver Broncos in Super Bowl XXIV in New Orleans, La., Jan. 28, 1990. (AP Photo/Lennox McLennon)

San Francisco 49ers vs. Denver Broncos at Candlestick Park Monday, December 15, 1997. 49ers beat Broncos 34-17. Joe Montana speaks to crowd during half time ceremonies for retiring his jersey and number. (AP Photo/Al Golub)

August 6, 2016 - Canton, Ohio, United States - Former San Francisco 49ers quarterback Joe Montana, owner Ed DeBartolo and Jennifer Montana during the 2016 NFL Hall of Fame enshrinement at Tom Benson Hall of Fame Stadium. (Cal Sport Media via AP Images)