The NHL growth club introduced the moves Saturday.
Reinhart has 37 online games of NHL encounter with Edmonton and the New York Islanders, who drafted him with the fourth general select in 2012. Vegas signed him to a two-12 months, $1.6 million offer.
Leipsic appeared in his initial 6 NHL online games during the 2015-16 year with Toronto. He obtained a two-12 months, $1.3 million deal with the Golden Knights.
Vegas also signed forward Cody Glass, forward Nick Suzuki and defenseman Erik Brannstrom to three-12 months, entry-stage contracts. Glass was the sixth general select very last month, when Suzuki was 13th and Brannstrom went 15th.