Milestones

Tom Glavine's 300 wins, A-Rod's 500 home runs, or Barry Bonds' tying Han Aaron. What's the bigger deal?

Unfair question to barry because it's only tying the record. Breaking it is going to be way bigger than any of these.  But, sportsnation on espn seems to think Glavine's 300th is biggest.
Bonds-26%
A-Rod-25%
Glavine-32%
All the Above-17%