Barry Bonds, the all-time home run king, played 22 years for the Pittsburgh Pirates and San Francisco Giants. He has 762 career home runs but has been linked to performance-enhancing drugs in the past.
Roger Clemens, a seven-time Cy Young Award winner and two-time World Series champion, racked up 4,672 strikeouts -- third-most in MLB history -- and won 354 games. However, he has been linked to performance-enhancing drugs in the past.
Mariano Rivera holds the all-time record for saves with 652. He was 82-60 with a 2.21 ERA, 1.000 WHIP and 1,173 strikeouts in 19 seasons, all with the Yankees. The five-time World Series champion won World Series MVP in 1999 and was a 13-time All-Star. Rivera would become the sixth reliever to enter the Hall of Fame and, inarguably, the best among Dennis Eckersley, Bruce Sutter, Hoyt Wilhelm, Rollie Fingers and Trevor Hoffman.