He's been getting props in his megathread, but I know a lot of people won't bother to look in there, so I thought it was worth a dedicated thread up here.
Going six for six is a rare enough feat. According to Anthony diComo on Yankees.com:
In this case, Damon's contribution was also vital to the Yankees' winning the game—his hits included a 2-RBI game-tying hit when they were down 10-8 in the eighth, and of course the game winner in the ninth!... no Yankee had done it since Myril Hoag back in 1934. Only one other player -- Omar Vizquel in 2004 -- had ever achieved the feat at Yankee Stadium, and no one from the home team had ever done so in the Bronx.
I'll repeat a link I posted in the Damon megathread: Damon tied an AL record for most hits in a nine-inning game. In all, just 92 players—and just 62 since 1900—have had at least six base hits in nine; of those, only two NL guys managed seven. Here's the list:
And here are the caps I posted in the Team Hero thread: