Toshack started the 1946–47 season strongly, taking 5/46 and 4/70 as New South Wales opened the season with a five-wicket win over Queensland. He removed Australian wicket-keeper Don Tallon twice. After going wicketless in a rain-curtailed match for his state against England, Toshack was selected to make his Ashes debut in the First Test at Brisbane. With the emergence of leading all rounder Keith Miller, Toshack was relegated to first change bowler as Miller began his much celebrated partnership with Lindwall. Toshack was unbeaten on one in his first innings with the bat when Australia were bowled out for 645 on the third day.