In January, Feldt was a member of the QAS Emerging Origin squad, and played in the Auckland Nines for the 4th consecutive year. In round 4, he played his 50th NRL game. Soon after, he re-signed with the Cowboys until the end of the 2020 season. In Round 16 against the Penrith Panthers, Feldt scored the try of the year by leaping in the air to catch a cross field kick from Michael Morgan, towering over Panthers winger Josh Mansour to score in the corner and tie the match at 12-12 all with a conversion to come in the 78th minute. Cowboys backup goal kicker Ethan Lowe nailed the kick from the sideline to win the match 14-12. The Cowboys had a finals winning run into the 2017 NRL Grand Final. Feldt started on the wing in the Grand Final against the Melbourne Storm in which they lost convincingly 34-6. For the second straight season, Feldt finished the season as the Cowboys top try scorer with 15 tries in 28 matches.