NFL Wilson Game Used footballs

[miracleonice80]

Hi...Does Wilson stamp all NFL game footballs with the week of the game? I saw a few Wilson NFL footballs from 2009-2010, and some had it and some didn't......anyone with any info? Thanks...

[NEFAN]

I have a Kickers ball from the 07 season, it has a date stamp. Also have a non kickers from the same season, no date stamp.