Instead, outsider Rodrigo Bruno got the nod and is among 26 players from Super Rugby runners-up the Jaguares who will travel to Japan for the September 20-November 2 global tournament.
"I was convinced more by other players (than Isa)," Ledesma told reporters after revealing his hand for Pool C matches against France, Tonga, section favourites England and the United States.
"And I wanted to give priority to those playing at home over those based abroad.
Contrary to what sections of the media thought, Facundo was not a certain choice."
