Forget every NFL player ever that's rocked No. 26 in their careers ... 'cause Clinton Portis says HE put that digit on the map -- and he's downright HAPPY Adrian Peterson chose it in D.C.!!
Portis dominated the Redskins' backfield from 2004 to 2010 -- and he did it the whole time in the two-six ... a number Washington just gave to A.P. after signing him Monday.
