Ebay currently has what's advertised as a game worn Lou Brock Cardinals jacket up for auction, said to be 1970s according to the seller and the accompanying Lou Lampson LOA.
Anyway, the Wilson tag below shows a style of tag not used until 1987:

Also, the description indicates that the curled up tag underneath the Wilson tag is marked "CY", which would date the manufacture of the jacket to February, 1990.
At best, it's a jacket worn by Brock in 1990 spring training for instructor purposes; at worst...who knows.
An attempt to contact the seller regarding this item as per GUU rules was made; however, the seller is not accepting emails through eBay.

Dave Miedema

Also, the description indicates that the curled up tag underneath the Wilson tag is marked "CY", which would date the manufacture of the jacket to February, 1990.

At best, it's a jacket worn by Brock in 1990 spring training for instructor purposes; at worst...who knows.
An attempt to contact the seller regarding this item as per GUU rules was made; however, the seller is not accepting emails through eBay.
Dave Miedema