Thomson always insisted that he had no foreknowledge of Branca 's pitch .
Giants catcher Sal Yvars told Prager that he relayed to Thomson the stolen sign for Branca 's fastball .
Thomson always insisted that Branca had no foreknowledge of Branca 's pitch .
Giants catcher Sal Yvars told Prager that he relayed to Thomson the stolen sign for Branca 's fastball .