5 of the Western Conference Final. During Game 6, he scored a hat-trick—including the game-winning goal—as the Predators defeated the Ducks 6–3 to win the Clarence S. Campbell Bowl trophy and advance to the Stanley Cup Finals for the first time in franchise history. Sissons also set another record by becoming the first player to score a hat trick in a series-clinching win in the conference final since Patrick Kane in 2013. He remained in this shutdown role as the Predators met the Pittsburgh Penguins in the 2017 Stanley Cup Finals. During Game 5 of the Finals, which the Penguins won 6–0, Sissons received a Match penalty after cross-checking Olli Maatta with 34 seconds remaining in the period. He was not suspended following the game and remained eligible to play in Game 6. Following the Predator's elimination from the playoffs, they released their 2017 NHL Expansion Draft for the Vegas Golden Knights which did not include Sissons. In the Predators home opener for the 2017–18 season, Sissons and Roman Josi each missed the game due to injuries. Following an injury to Nick Bonino in October, Sissons took on increased responsibility including penalty killing. On March 17, 2018, Sissons scored two goals to help the Predators become the first team to clinch a playoff spot. During their playoff series against the Colorado Avalanche, Sissons played on the Predators top-line alongside Nick Bonino and Austin Watson. By Game 4, Sissons had accumulated three goals and two assists for five points as a top-line winger while his line combined for nine goals and 19 points as the series concluded. With his assistance, the Predators beat the Avalanche in Game 6 and qualified for the Western Conference Second Round against the Winnipeg Jets. He finished the post-season with seven points through 13 games. Following his third playoff run, Sissons returned to the Predators for their 2018 training camp and pre-season games. He played in four pre-season games and took 23 faceoffs, winning 16 of them. He continued to lead the team in faceoff wins as the season continued and finished second behind Ryan Johansen by winning 53.1 percent of his draws. Sissons began the month of October on the Predators fourth line between Zac Rinaldo and Miikka Salomaki as the team held a 5–1–0 record. On October 25, 2018, during a game against the New Jersey Devils, Sissons played in his 200th NHL game