made his NFL debut in the Seahawks' season opener against the Denver Broncos. In the 27–24 loss, he had six punts for 354 net yards. Dickson was named NFC Special Teams Player of the Week for his performance in Week 8 against the Detroit Lions. With minutes remaining at fourth-and-8 from their own three-yard line, Dickson was instructed to waste time in the end zone before giving up an intentional safety. Instead, after receiving the snap, he ran it nine yards for the first down, sealing the win. The unscripted play was later dubbed "The Aussie Sweep." Dickson was named the NFC Special Teams Player of the Month for November 2018. Dickson punted the ball 78 times for 3,759 yards in the 2018 season. His average of 48.2 yards per punt ranked as the second-highest in the league. In addition to punting, Dickson occasionally used the previously obscure drop kick maneuver on kickoffs for the Seahawks, both onside kicks and standard deep kicks. For his efforts, Dickson was voted into the 2019 Pro Bowl, the first rookie punter to participate since Dale Hatcher in 1985. In addition, Dickson was named as a first-team All-Pro. In the 2019 season, Dickson had 74 punts for 3,341 yards, an average of 45.2 yards per punt. In Week 2 of the 2020 season, against the New England Patriots on Sunday Night Football, Dickson punted four times (50-yard average) with all four of them landing inside the 20-yard line during the 35–30 win. He would be named the NFC Special Teams Player of the Week for the performance. In Week 15 against the Washington Football Team, Dickson punted four times, all landing inside the 20-yard-line, earning another NFC Special Teams Player of the Week honor. During the 2020 season, Dickson punted 61 times for 3,028 yards, with his punting average of 49.6 yards being the second-highest in the league, and the 9th highest single-season average of all time. Dickson signed a four-year, $14.5 million contract extension with the Seahawks on 4 June 2021. During Week 5 of the 2021 season, in a game against the Los Angeles Rams, Dickson initially had a punt blocked. He then chased down the football behind the line of scrimmage, picking it up with one hand, and punting it for a second time while on the run, reminiscent of Australian rules football. The punt would go for 68 yards, his