10. Tony Richardson
Though he only rushed for 1,727 total yards in 16 NFL seasons and rarely made an impact with the football in his hands, Tony Richardson may have been the best blocking back of his generation. After failing to stick as an undrafted free agent with the Dallas Cowboys in 1994, he became a key contributor for the Kansas City Chiefs after joining the team in 1995. In 11 seasons with the Chiefs, Richardson paved the way for star running backs Priest Holmes and Larry Johnson to rush for more than 1,000 yards on five different occasions and earned Second Team All-Pro honors in 2004.
He also led the team in rushing in 2000, running for a career-high 697 yards while also adding nearly 500 yards as a receiver. In his final five seasons with the Minnesota Vikings and New York Jets, Richardson showed his longevity by continuing to excel as a lead blocker, helping Adrian Peterson, Chester Taylor and Thomas Jones all enjoy 1,000-yard campaigns. Following his retirement after the 2010 season, he concluded his career having blocked for a 1,000-yard rusher in nine different seasons for five different players. He may not have been a box-score superstar, but few players impacted the offensive success of their respective teams as much as Richardson did.