The only alleged incidence that I had ever heard was a young Chimela
at Miami Jai-Alai in the 60's playing singles throw front wall
to back wall to front wall...I heard that legendary tale while
I was learning as an amateur player in 1966. It was started by
older amateur players who went to MJA every night and watched
a young Chimela throw blast after blast. I started sneaking into
MJA in 1967-68 and did see Chimela throw a home run during a singles
game that bounced on the 3 line...but the alleged feat never went
away once I started playing at Miami in 1968. Later on I heard
that it hit the pad...but still...
Since this isn't the first time this alleged feat or possibility
of anyone ever doing it has come up on Tiger's site...I figured
I would get a straight answer and opinion from a player that played
with and against Chimela while both were in their prime. I received
this answer from the great Orbea I (usually regarded as the best
frontcouter of that era ? one of the best in history). He said
that while he witnessed Chimela come close...he never heard of
any player ever doing it and in his opinion "is not possible."
So I believe we can put the legendary 'grand slam'
home run of Jai-Alai to rest...but I do wish to add that while
it took no particular skill to throw...it was one of my favorite
throws to make. 
