Jujhar Khaira, Dominik Kahun and Theodor Lennstrom were not tendered qualifying offers. If they go unsigned by Wednesday, they will be eligible to become unrestricted free agents.
Yamamoto scored eight goals and added 13 assists in 52 games with Edmonton last season. The 22-year-old right winger has a total of 20 goals in 105 career NHL games.
Benson, Marody and Skinner led the Bakersfield Condors to the AHL Pacific Division title in the shortened post-season playdowns, capturing the John D. Chick Trophy over the Henderson Silver Knights.
Benson and Marody finished tied for third in AHL scoring this past season. Benson notched 10 goals and 26 assists in 36 games with Bakersfield, while Marody led the league with 21 goals.
With 20 wins, Skinner led the AHL in victories last season, (20-9-1) posting a 2.38 goals-against average. This past January, he recorded his first NHL win, making 33 saves to beat the Ottawa Senators.