Berube, 25, posted a 3-2-2 record with a 3.42 goals-against average and an .889 save percentage in 14 appearances with the New York Islanders last season. In 21 career NHL games, all with the Islanders, Berube has registered a 6-4-3 record with a 3.11 GAA and .900 save percentage.
The Repentigny, Quebec, native paced the American Hockey League with 37 wins during the 2014-15 campaign, helping the Manchester Monarchs win the 2015 Calder Cup. He finished the regular season with a 37-9-6 record and ranked eighth in the league with a 2.18 GAA before going 13-3 during the 2015 Calder Cup Playoffs en route to the championship. He was also named an AHL All-Star in 2015.
Berube has appeared in 110 career AHL games with Manchester and Bridgeport, going 71-30-6 with a 2.30 GAA, a .913 save percentage and six shutouts.
Oesterle, 25, paced Bakersfield Condors defensemen with 32 points (7g, 25a) during the 2016-17 campaign. He also played in two games with the Edmonton Oilers last season.
The Dearborn Heights, Michigan, native has played in 157 career AHL games with Oklahoma City and Bakersfield, recording 20 goals and 63 assists for 83 points. In 25 career games with the Oilers, Oesterle has recorded six assists.