Koalska will report to the AHL's Binghamton Senators. The 26-year-old American played in three games with the Bridgeport Sound Tigers this season before being loaned to the Hershey Bears. He got into three NHL games with the Islanders.
Malec, 24, a Slovakian, had one goal and 12 assists in 33 games with Binghamton this season. He's appeared in 45 NHL games in his career.