Reaves had 10 points (four goals, six assists) in 79 games with the Golden Knights and Pittsburgh Penguins last season, including two assists in 21 games after he was acquired by Vegas in a trade Feb. 23.
Reaves scored two goals in 10 Stanley Cup Playoff games, including the game-winner in Game 5 of the Western Conference Final against the Winnipeg Jets that helped the expansion Golden Knights reach the Stanley Cup Final, which they lost to the Washington Capitals.
The St. Louis Blues selected Reaves in the fifth round (No. 156) of the 2005 NHL Draft. He has 61 points (31 goals, 30 assists) and 789 penalty minutes in 498 NHL games with the Golden Knights, Penguins and Blues, and three goals in 46 playoff games.