Not a single signed, but it can be displayed like it. Unofficial ball is signed in green ballpoint alone on a panel "To George Hipp, Life as in baseball it's the number of times you arrive home safe that counts, Pete Reiser. Signature and inscription are 9/10.  Also signed in blue ballpoint by Fred Hutchinson (9/10, sweet spot), Ewell Blackwell (8/10, alone on panel), Larry Jansen (9/10, alone on panel) and Howie Judson (9/10, alone on panel).  Ball itself is NRMT.