QB Dawson who faced Bart Starr in Super Bowl I (3)

I believe the answer is:
len
(Other definitions for len that I've seen before include "Sir - - Hutton" , "- - Hutton, cricketer" , "Leonard (dim.)" , "-- Deighton, author" , "Boy" .)
I believe the answer is:
len
(Other definitions for len that I've seen before include "Sir - - Hutton" , "- - Hutton, cricketer" , "Leonard (dim.)" , "-- Deighton, author" , "Boy" .)