The limo driver and a woman traveling with McMahon also were injured.
Alcohol was not involved and the cause of the accident was under investigation, Edgell said.
McMahon, 51, played 15 seasons in the NFL and helped the Chicago Bears win the Super Bowl in 1986.
He was at Lake Tahoe over the weekend, where he competed in the American Century Celebrity Golf Tournament at Edgewood Tahoe Golf Course.
The Cincinnati Bengals are already leading the NFL in one statistical category: arrests.
With three arrests in eight days, the AFC North franchise has had a lot of off-field issues lately.
Cornerback Adam "Pacman" Jones pleaded not guilty to charges following a Sunday incident at a bar. Safety Marvin White is facing an assault case in Louisiana and running back Cedric Benson was arrested Sunday and charged with misdemeanor assault.
According to the Cincinnati Enquirer, the Bengals have had 35 arrests since 2000, first in the league.
COLLEGES: Southern California tailback Marc Tyler has been suspended from all team activities and the Trojans' season opener for comments he made that implied he gets paid to play for USC. When asked whether he could make more money at USC or in the NFL, Tyler said, "USC, they breaking bread," making a gesture indicating a large stack of money.
USC coach Lane Kiffin suspended his leading rusher for the Sept. 3 opener against Minnesota and possibly longer. The Trojans are entering the second year of a postseason ban during four years of NCAA probation stemming from illegal benefits provided to Reggie Bush.
Harvey "Scooter" McDougle Jr., a former Toledo running back, pleaded guilty to working with a Detroit gambler accused of placing bets on football and basketball games, the third ex-Rocket to be convicted in a point-shaving probe. "I needed the cash and the groceries at the time," McDougle said.
NBA: The Indiana Pacers have hired Jim Boylen as assistant coach, rounding out Frank Vogel's staff. Boylen was head coach at the University of Utah from 2007 to 2011. In the NBA, he earned two championship rings as an assistant for the Houston Rockets.
Nancy Lieberman is moving into the front office of the NBA Development League's Texas Legends after a season in which she became the first woman to coach a men's pro team. Under Lieberman, the Legends went 24-26.
CYCLING: Lance Armstrong's attorneys say illegal government leaks of grand jury information have sullied the cyclist's reputation, and have asked a court to order federal agents to discuss their contacts with the media. Armstrong's lawyers accused the Associated Press, the New York Times, the Wall Street Journal, Sports Illustrated, and 60 Minutes of reporting illegally leaked information.
- Inquirer wire services
