The steroid era in Major League Baseball, widely considered to encompass the early-to-mid 1990s and into the early-2000s is considered by many to be a black eye of the sport. It also brought some of the most iconic moments into focus — Mark McGwire and Sammy Sosa chasing down Roger Maris' home run record in 1998, and of course Barry Bonds surpassing the great Hank Aaron in 2007.
Though the records still stand, they're shrouded in doubt. Would McGwire and Sosa have eclipsed 500 home runs without the use of performance enhancing drugs? Is Bonds really the all-time home run leader?