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Top fantasy baseball free agents by position

Niko Goodrum has been playing regularly for the Detroit Tigers lately and he's eligible at three different positions. (Photo by Mike Carlson/Getty Images)

Whether one is winning their fantasy league or struggling to compete, there are always undervalued free-agent options available with the potential to aid teams. That is the purpose of this weekly column -- to pinpoint those options. So here we go, and remember players rostered in more than half of ESPN's standard leagues are not eligible for inclusion on this list!

Catcher: