The best-looking rookie of the entire 1990 class, and the card that proved a mid-run brand could go premium and win. Leaf came into 1990 positioned above the flagship sets, and the Frank Thomas at #300 became the reason to buy the product. Thomas turned into a two-time MVP and a first-ballot Hall of Famer, which gave the card staying power that most junk-wax rookies never earned. It belongs in Baseball Icons because it married a genuinely great design to a genuinely great player at the exact moment collectors were starting to reward both. The Big Hurt's rookie is the class of its year.

Leaf felt expensive. The packs cost more, the cards had that silver-and-white sharpness, and pulling the Thomas meant you'd hit the big one. Kids knew the number: 300, the last card in the set, the one everybody flipped to first when they cracked a pack. Thomas was enormous, hit bombs, and played for the White Sox in that black-and-silver look that felt tougher than everybody else's uniform. If you had the Leaf Thomas you kept it in a screwdown, not a soft sleeve. It was a trophy card in a hobby full of commons.

Donruss revived the Leaf brand in 1990 as a premium alternative, printed on white stock with a clean silver border and shot on better photography than the base Donruss set. Supply was tighter than the flagship, though "tight" in 1990 still meant a lot of cardboard. The Thomas #300 ran to $80-120 raw at the peak of his MVP years. Today a raw copy sits at $10-30 and a PSA 10 lives around $500-800, held up by genuine centering difficulty and Thomas's Hall of Fame résumé. It's one of the few junk-wax rookies that still commands respect at auction.

The main variation collectors care about is the two-series structure and centering, not errors. There's no famous Thomas Leaf error the way there is on his Topps card. What you watch for is edge wear on the silver border, which chips and shows, and left-right centering that ruins otherwise clean copies. The card was printed in both a first and second series distribution, but the #300 is the #300. Reprints exist. Any raw copy being sold as gem-mint should be checked under a loupe for the border wear that plagues this design.

Card #300, the final card in the base set. Front shows Thomas in a White Sox batting pose against a silver-grey border with thin black pinstripe framing and the Leaf logo. The reverse uses grey-and-black ink with a second photo and full stats. Genuine Leaf stock is bright white on the edges when you look at the card side-on. Reprints often feel thinner or show a yellowish core. Confirm the number and the silver border treatment, and check corners, since this design punishes any handling.