Blockbuster trades, like the one that sent slugger Adrian Gonzalez to the Boston Red Sox, get all of the attention from fans and analysts. But they are no more or less important than any other trade a general manager might make this offseason.

These under-the-radar trades are a valuable way to fill up a final roster spot, or to acquire some depth for the big league team or to bring in prospects as part of a rebuilding effort. No team can be built entirely from major trades and big free agent signings, and these deals show that winning in baseball is harder than it looks.

This offseason has been one of the busiest in recent memory, and dozens of players are now with new teams. Here is a look at the 15 most important minor trades made so far.

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