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James Harrison is entering his NFL season and remains one of the NFL’s hardest working players<p>James Harrison is 39 years old and entering his 15th season, yet he remains one of the league’s most efficient pass rushers.<p>His longevity is no accident; Harrison’s workout regimen certainly plays a role, …

Read more at CBS Sports: http://www.cbssports.com/nfl/news/watch-james-harrison-still-loves-playing-volleyball-with-a-medicine-ball/