Important pair of Sports Illustrated magazines with covers featuring - and signed by - Muhammad Ali. 1) December 23, 1974 - a tuxedo-clad Ali smiles on the cover of SI's Sportsman of the Year issue, signed in 8/10 silver Sharpie. Magazine is in VG-EX condition with some age discoloration at the edges. 2) September 30, 1996, Ali-Frazier pictured 25 years after their first fight, each signed in silver Sharpie (Ali 7/10 - Frazier 8/10). Magazine is in EX+ condition. Note that neither has a mailing label on the cover. Full individual LOAs from PSA for each magazine.