SP Authentic Basketball question

By The Number cards - I'm assuming that the clothing piece on the card isn't game used? Or is it? If not, why in the world would they use it? Seems to small to be the numbers from a jersey.
WTB:
CINCINNATI REDS
1976 - 1991 - Topps PSA 10
1983 & 1985 Fleer PSA 10
1985 Donruss PSA 10
Blue Ink Signed Topps Cards
Game-Used Bats/Jerseys
OPC PSA 10
MC & OC Cards
OTHER:
Eric Davis Anything
Votto, Willingham, Cantu, Doumit, Gomes
Baron Davis Game Used Jersey
CINCINNATI REDS
1976 - 1991 - Topps PSA 10
1983 & 1985 Fleer PSA 10
1985 Donruss PSA 10
Blue Ink Signed Topps Cards
Game-Used Bats/Jerseys
OPC PSA 10
MC & OC Cards
OTHER:
Eric Davis Anything
Votto, Willingham, Cantu, Doumit, Gomes
Baron Davis Game Used Jersey
0
Comments
Kevin