Noiseware and Noise Ninja are probably the top names that get thrown around. You can try the noise reduction from the DPP software that came with the camera. Also, check in your custom functions that high ISO noise reduction is set to strong when shooting the night games.
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Lori Putman flickr
~No one can drive us crazy unless we give them the keys
~~Life isn't about waiting for the storm to pass, it's about learning to dance in the rain!
7D | 300L f/4 IS | 135L | 35L | 100/2.0 | 50/1.4
430 EX, 580 EX II Speedlites
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