On 13 June 2020 Luke departed St. George for the Brisbane Broncos. Luke had played just three games with the club, failing to register a win with the team. There were suggestions that Luke left due to being frustrated with game time but Luke later spoke to the media saying "With support from the club and their understanding they were happy to release me to take an opportunity in Brisbane where my family and I were going to live after footy finished. This has nothing to do with what has been going on here and I advise youse all to wake yourselves up. "I’m doing this for my family.