Some of the biggest difference makers come the playoffs did not start the year with that team. Just think about last years World Series when Cliff Lee mowed down the Yankees in game one.
In 2010, with many teams on the brink of the playoffs, everyone was looking to improve their team.
Here are the top five deals made at the trade deadline.
Coming from a dismal team in Pittsburg, Javier Lopez was thrust into a playoff race as he was shipped to the Giants. The side-arm lefty has pitched nine and a third innings for his new team, sporting a 0.96 ERA. He has given up just four hits, striking out seven batters while walking two.
Matt Capps also got the benefit of being thrown into a playoff race. Coming from a depressing team in Washington, D.C., the first place Minnesota Twins brought in a quality closer to solidify their bullpen.
In 12 appearances, Capps has given the Twins five saves, while pitching a 2.25 ERA. He has struck out 10 batters while walking just four.
The Yankees brought in Kerry Wood to further solidify their bullpen. After surrendering a home run in just his second game as a Yankee, Yankee fans were hesitant to embrace the move. Since then, however, Wood has won over New York.
Since giving up that home run, Kerry Wood has not given up another run. He has a 0.77 ERA in 10 games. He has struck out 15 batters in 11 and two thirds innings, gving him a SO/9 ratio of 11.6.
After playing in Houston for nine seasons, Roy Oswalt may get his first smell of the playoffs since 2005. Playing on just his second career team, Oswalt has gotten off to a great start, pitching to a 2.43 ERA in five starts with the Phillies.
Austin Kearns is quietly putting together an incredible end-of-the-season run. Since coming to the Yankees, he is hitting .311 with five extra-base hits in 45 at-bats. He is hitting .359 in his past 12 games, during which he put together an 11-game hitting streak.
Coming over to the Yankees as a bench player, Kearns is seeing more and more time as a starter and could make a big impact for the Yankees as they battle the Rays for the division title.