The trade deadline can be a defining moment during the season.

The trade deadline allows teams that buy to transform themselves from a contender into World Series champions, while the teams that sell start to look towards the future.

Not every deal that has been made in recent memory has worked out (see July 31, 2004: Mets trade Scott Kazmir for Victor Zambrano), but there are plenty of other deals that have.

As we wait anxiously for the 2010 trade deadline, hoping our favorite team adds that special player who will make the difference, in the meantime, sit back, relax and enjoy.

As I present ” MLB Trade Deadline: The 10 Biggest Pennant-Changing Deals of the 2000s.”

These are the ten best deadline deals made by a contender in the last decade, that have paid major dividends for that team.

Is your favorite team on here?

It’s time to find out.

Play Ball.

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