1998 Upper Deck Baseball Retro #Q19 Mark McGwire Quantum Leap card #10/50. This card has been graded and encapsulated by PSA MINT 9. The bottom right corner shows wear, while the other three corners remain sharp and intact. The edges are smooth and the surface is clean. This card is number 10 out of only 50 that were produced. This is only the 4th example graded by PSA and only one is graded higher.