The Top moments of games that I attended:
1. Carl Yastrzemski Day- 1983- Not many people know it, but Yaz spontaneously decided to take a lap around Fenway shaking hands with fans. Until then, players routinely took their laps in automobiles or golf carts. It was totally out of character for Yaz who was a very private, shy man that never sought attention or showed emotion.
2. July 27, 1975 -- Double Header sweep of the Yankees 1-0 and 6-0. Fred Lynn saved game one with a late-inning diving, sliding catch of a Craig Nettles bases loaded drive that would have been a sure triple.
3. Jacoby Ellsbury's steal of home against the Yankees in 2009.
4. David Ortiz' walkoff homer on Easter Sunday 2004.
5. Trot Nixon's Game-winning homer off Clemens in his Yankee Stadium duel with Pedro.
6. Nick Green's walkoff windblown homer around the Pesky Pole on Father's Day 2009.
7. July 4, 1973 Double Header sweep of the Yankees at the original Yankee Stadium-- 2-1 and 1-0. In game 1, Ray Culp earned the final win of his career.
8. Ortiz 3-run walk-off HR with 2 outs and 2 strikes against Texas in 2006 for a 5-4 win.
9. 2009 - Papelbon striking out Carlos Pena, B.J. Upton and Carl Crawford in a row with the tying run on 3rd base and the go ahead run on 2nd. My recollection is that all the strikes were swinging strikes and there was only one foul ball.
10. Daniel Nava's Grand Slam HR against the Phillies in 2010 on the first pitch he saw in the majors.
Edit: Added the games in bold. I must be brain dead. I forgot my one number 1.