So Congress has subpoenaed a bunch of steroid-use-related documents from Major League Baseball. (STORY HERE)

I wanna know why it's an issue with which Congress should concern itself. Are overpaid beefed-up jocks who are shortening their lifespans and shrinking their gonads a threat to national security?

Not that it's not an issue worthy of someone doing something about, but why a Congressional investigation? Is it really their job? If laws have been broken, let the cops investigate, let the prosecutors prosecute, let the offenders in jail, and let my asshole Congressman (for whom I did not vote) get back to doing what I'm reluctantly paying him to do.