Riley Armstrong is the first head coach in franchise history, leading the Mariners in their first two ECHL seasons. In the summer of 2019, Armstrong was promoted to Assistant General Manager and also received a two year extension, taking him through the 2021-22 season. Armstrong came to the Mariners to from the Wheeling Nailers, the ECHL affiliate of the Pittsburgh Penguins, where he was an assistant coach from 2016-18. In his 12-year professional playing career, Armstrong spent his first five seasons in the San Jose Sharks organization, including three with the Worcester Sharks, with whom he made several trips to Portland as a visiting player. He made his NHL debut in 2008-09 for San Jose. Armstrong made stops in some of Europe’s top professional leagues, playing in Russia, Finland, Germany and Sweden. He also had additional stints in the AHL and ECHL during that time before concluding his career with the ECHL’s Reading Royals. He played a total of 610 professional games, including 404 in the AHL, 75 in the ECHL and 129 in Europe, and recorded a total of 156 goals and 180 assists for 336 points. Armstrong resides in Gorham with his wife Amber, daughter Peyton and son Ezra.