Description:1964 Warren Giles autographed letter to Willie Mays (PSA/DNA 8 NM-MT). Typewritten one page letter on National League letterhead as written to Willie Mays by NL President Warren Giles thanking him for his play in the 1964 All-Star Game which the NL won. Signed by Giles in black ink adding inscription, "your base running was outstanding Willie". Some tape residue at top and bottom margins. Encapsulated by PSA/DNA (8 NM-MT) with special "W.Mays Collection pedigree labeling: Signature: NM-MT, Letter: VG-EX