1997 MLB All-Star Game in Cleveland
1997 World Series, Game 3 Indians/Marlins
1992 Cavaliers Playoffs: Game 1 or 2 vs New Jersey (Had to edit this, Petrovic was not killed in this off-season... all this time I thought he was, it was 1993)
1992 Cavaliers Playoffs: Game 7 vs Boston (Last NBA game for Larry Bird)
1992 Cavaliers Playoffs: Game 3 vs Chicago (The game before the game where Danny Ferry punched Jordan)
1990 Browns vs Bills playoff game where Clay Mathews intercepted Jim Kelly at the one yard line to win the game... this was after Ronnie Harmon I believe was WIDE OPEN in the corner of the endzone and couldn't bring in the pass.
1999 Browns vs Cowboys Hall of Fame Game
2008 Cowboys vs 49ers during the final year at Texas Stadium

There are others, but these are my favorites.

1999 Last Game at Tiger Stadium
2005 MLB Home Run Derby (Abreu crushing previous record and Pudge making it to the finals in Detroit)
2008 NCAA Sweet 16 and Elite 8 games at Ford Field (Steph Curry games)
2009 Winter Classic at Wrigley Field (Red Wings vs Blackhawks)
2006 American League Championship Series Game 4 (Ordones walk off home run to win the pennant for the Tigers)
2009 Stanley Cup Finals Game 1 (Red Wings vs Penguins)
Lions vs Steelers on Thanksgiving (the infamous Jerome Bettis coin flip game)

AFC Championship in Denver 1998
Ryder Cup 2004
The Masters 2008 (Sat and Sun)
Indy 500 multiple times
United States Grand Prix (at Indy-formula 1)- every year it was held

The Open Championship at St. Andrews- I have tickets for Saturday this year (!)

06' OSU vs. "Them" game

1987 Orange Bowl. Arkansas v. Oklahoma

02 OSU vs Michigan

2008 U.S. Open Golf @ Torrey Pines. Tiger vs. Rocco.

Jets vs Colts - AFC Championship

2006 #1 Ohio State vs #2 Michigan
2007 #1 Ohio State vs #2 Wisconsin in basketball (49-48 win clinched the Big Ten title)

Fab1b wrote: Partied outside the stadium for Phily/NE Super Bowl

I partied inside the stadium.

In 1964, I marched in the Tournament of Roses Parade in Pasadena, California. You got a choice of money or a ticket to the Rose Bowl Game. I took the ticket. The game wasn't very good and I can't even remember off hand who won, but I guess I'd have to call that the "biggest game" I've ever actually attended. Years ago I watched the Michigan State Spartans play BGSU's men in Anderson Arena and I remember Judd was pretty ticked off with the officiating and the Falcons won the game. That would probably have been the second biggest game I've actually seen. Then of course, I have also witnessed several State Championships that carried a more personal significance but most people would not have considered them particularly big. I did.

2002 OSU v. Michigan

Swamp Fox wrote: In 1964, I marched in the Tournament of Roses Parade in Pasadena, California. You got a choice of money or a ticket to the Rose Bowl Game. I took the ticket. The game wasn't very good and I can't even remember off hand who won

Illinois 17
Washington 7

Barcelona vs Real Madrid (nothing in America comes close)

Indians vs Marlins World Series
Colts vs Steelers AFC Divisional Game
Pacers vs Lakers NBA Finals
Colts vs Patriots AFC Championship Game
Red Wings vs Flyers Stanley Cup Finals (although I was really young, so I dont fully appreciate it)
1999 and 2000 Final Four

Super Bowl XLIII

also

four AFC Championship Games (1994, 1997, 2004 and 2008)

2008 regular season finale at Lambeau Field to watch my Green Bay Packers defeat the Detroit Lions. That was the first time in NFL history a team went 0-16, and my girl got on the jumbotron with the sign she made for the game.

What's even better about it, the Lions went 4-0 in the preseason only to finish 0-16 in the regular season!

probably the Sugar Bowl in January

Going to have to say OSU vs Oregon in Rose Bowl

Game 1 of the 1990 World Series

2002 National Championship OSU vs Miami 2OT

We had a blast, didn't want to drop the coin on tix but still saw all the game!

brutus161;373430 wrote:I partied inside the stadium.

I had a blast just didn't want to drop the coin on the tix. Saw all the game as well.

I attended the HOF game in 2002, the Houston Texan's first every regular season game vs. the Giants. I'd have to say that's the "biggest" in terms of impact, since seing an NFL team's first game ever in person isn't something that a lot of people can say.

Other than that, the 1997 Rose Bowl with my uncle (OSU over Arizona State) the OSU/Michigan game in 2006, OSU/Penn State in 2008, and OSU/USC last year. I've also went to the FSU/Miami game in 2001, and the Texas A&M/OU game in 2002. That was probably the best game I've ever seen live, as A&M pulled off a historic upset to let OSU into the NC game basically.

Barçelona vs. Villarreal in Barçelona
Tour de France

'02 Ohio State - Michigan FB

Several NCAA I Cross Country Championships

Competed in 1981 Boston Marathon