The top one looks to me like a World Series ball from 1978 or 79. All of the signatures are New York Yankees, and Rizzuto was the play by play guy at the time, along with Bill White, I think. The sigs I can make out are:
Greg Nettles, 3B
Catfish Hunter, P
Carlos May, OF
Fred Stanley, IF
Bucky Dent, 2B
Chris Chambliss, 1B
Ron Guidry, P (and a fine one at that)
Mickey Rivers, OF (aka Mick the Quick)
Paul Blair, OF
Reggie Reggie Reggie
Lou Piniella, OF (at the time)
Thurman Munson, C (killed ina plane crash)
Willie Randolph, SS
I might be off on the year, and some positions, but I know those names pretty well. Had to live through that Yankee dynasty, and I'm a Met fan, so it was pretty rough.
They are DEFINITELY worth some dough!!!!