On November 11, 2020, it was announced that Sulte would join Portland's MLS roster as a homegrown player from the 2021 season.[4] He is the first player from Alaska to sign an MLS Homegrown contract with an MLS club.[5] Sulte chose Portland over a scholarship offer to play college soccer at Georgetown.[6]
On May 1, 2021, Sulte made his MLS debut starting in a 4–1 loss to FC Dallas. At the age of 19 years and 6 days, Sulte became the second youngest goalkeeper to start an MLS match. Sulte, 6 ft. 7 in., became the tallest goalkeeper in MLS history to play in a match.[7]
Indy Eleven (Loan, 2024)
On February 23, 2024, Portland announced that Sulte would spend the 2024 season on loan at USL Championship club Indy Eleven.[8] Sulte made his debut for Indy Eleven in a 1–1 away draw against Colorado Springs Switchbacks FC on April 20.[9] Sulte won his first clean sheet on May 4, in a 1–0 victory away to Monterey Bay FC.[10] He won his second league clean sheet in a 1–0 away win over Birmingham Legion FC on June 9 and his third on June 15 in a 1–0 home win over San Antonio FC.[11][12] Sulte was named to the USL Championship Team of the Week and won the Save of the Week award for his week 15 performance against San Antonio, in which he saved a penalty kick and made his fifth overall clean sheet of the season in the league and cup.[13][14] Sulte ended the season with 9 league and 2 Open Cup clean sheets, appearing in 31 matches for Indy Eleven.[15]