Hitters who have breakthroughs after age 25

https://www.baseball-reference.com/players/m/martijd02.shtml

Good article

https://sabrbaseballcards.blog/2020/05/06/on-cropping-and-layers/

Latin American baseball stats

https://www.1800beisbol.com/baseball/deportes/beisbol_mexico/george_brunet_beisbol_mexicano/

Venezuelan stats

http://www.pelotabinaria.com.ve/beisbol/mostrar.php?ID=brungeo001

OK ebay seller

https://www.ebay.com/sch/m.html?_nkw=&_armrs=1&_ipg=&_from=&_ssn=homeplatecards&_sac=1#seeAllAnchorLink

Post Cereal

https://postcerealbaseballcardmuseum.weebly.com/navigate-site.html

https://www.baseball-reference.com/players/w/wilkste01.shtml
12-0 over 2 years
17-4 in rookie season
59-30 for career