[ClownQuestionBro]

hi, ive never collected game used stuff very much so ive got a few dumb questions if someone more knowledgeable doesn't mind helping me out... I just picked up this jersey that is believed to be game used. (I assume from the tag from the 1989 season, which would be Ben McDonald's rookie season). What am I supposed to look for to know for sure that it's game used or even team issued and not from the sporting goods store? Is that maybe what the "T" means? does psa/dna or someone like that certify equipment as game used? And maybe a long shot, but was wondering if any of you have a 1989 orioles road jersey to compare to it. thanks for any help!