Jonathan Drouin, F:The 22-year-old was acquired in a trade from the Tampa Bay Lightning for the Canadiens' top prospect and heir apparent to Markov, defenseman Mikhail Sergachev, on June 15. Drouin was third on the Lightning with 53 points (21 goals, 32 assists) in 73 games last season. He will have an opportunity to play a consistent top-six role with the Canadiens, something he did not have while moving up and down the lineup in Tampa Bay. … Karl Alzner, D:He signed a five-year, $23.125 million contract as an unrestricted free agent July 1. Alzner essentially replaces Alexei Emelin on the left side of the Canadiens defense. Playing the role of stay-at-home defender and top penalty-killer, Alzner should slot in next to Jeff Petry on the second pair -- unless he is asked to step into Markov's role on the top pair, which would be less than ideal. … Ales Hemsky, F:Limited to 15 games with the Dallas Stars last season because of a hip injury, Hemsky, who turns 34 on Aug. 13, represents a solid depth scoring option on a very reasonable one-year, $1 million contract. In his three previous seasons prior to 2016-17, he averaged 38 points and 75 games, and is responsible enough in his zone to contribute in other areas. … David Schlemko, D: He was acquired in a trade with the Vegas Golden Knights on June 22 and has the inside track on a spot on the left side of the second or third defense pairing.