The Dual RB System: For Better or Worse?

It seems today the majority of NFL coaches have bought into the dual running back system, mostly stating, "It takes multiple backs to win in this league."  They may be on to something.  Dating back to the 2000 Superbowl, 10 of the last 13 SB champs have had 2 Rbs with 100 + carries during regular season play.  Two of the exceptions came courtesy of the New England Patriots (2001, 2004).  Leave it to Belichick to make the exception to the rule.

Year	SB Champ	Lead Rusher	2nd Lead
2012	Ravens	Rice - 257	Pierce - 108
2011	Giants	Bradshaw - 171	Jacobs - 152
2010	Packers	Brandon Jackson - 190	Kuhn - 84
2009	Saints	Mike Bell - 172	Pierre Thomas - 147
2008	Steelers	Willie Parker - 210	Moore - 140
2007	Giants	Jacobs - 202	Derrick Ward - 125
2006	Colts	Joe Addai - 226	Rhodes - 187
2005	Steelers	Parker - 225	Bettis - 110
2004	Pats	Corey Dillon - 345	Kevin Faulk - 45
2003	Pats	Antowain Smith - 182	Kevin Faulk - 178
2002	Bucs	Michael Pittman - 204	Mike Alstott - 146
2001	Pats	Antowain Smith - 281	Marc Edwards - 51
2000	Ravens	Jamal Lewis - 309	Priest Holmes - 137