The team announced the moves on their website Friday.
Lindberg had two goals and two assists in the preseason. The 23-year-old Swedish center had 28 goals and 28 assists at Hartford of the AHL last season.
McIlrath, the team's first-round draft pick in 2010, beat out Diaz for the seventh defenseman. The Winnipeg native had six goals, 11 assists and 165 minutes in penalties at Hartford last season.