Football coach (1871–1954) responsible for devising the double-wing formation. The ‘Pop Warner’ League is named in his honor. Vintage ink signature, “Glenn S. ‘Pop’ Warner,” on an off-white 4 x 2.25 card. In fine condition, with a bit of scattered mild toning and soiling. Pre-certified Steve Grad/PSA/DNA and RRAuction COA.
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