On today's ep. of Poppin' Packs, Leigh welcomes Mavericks legend Derek Harper to the Instagram live stream. Harp opens a pack of '91-92 Upper Deck cards while discussing his battles with the Lakers, talking trash with Vernon Maxwell, and how Dale Ellis was a young star-in-waiting in Dallas. - - - - Learn more about your ad choices. Visit megaphone.fm/adchoices
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