Biggest lock
Matthews, 20, won the Calder Trophy as the top rookie in the NHL last season. He was tied with Tampa Bay Lightning forward Nikita Kucherov for second in the League in goals behind Pittsburgh Penguins center Sidney Crosby (44), playing center primarily with Zach Hyman at left wing and Nylander and Brown splitting time at right wing. He will be the No. 1 center and featured on the top power-play unit.
Biggest battle
Babcock has said throughout training camp that fourth-line center is up for grabs. Dominic Moore, 37, signed to a one-year, $1 million contract July 1 as an unrestricted free agent and was thought to be the front-runner, but Miro Aaltonen, 24, who was signed to a two-year, entry-level contract March 17, has played himself into consideration for the job, earning the opportunity to play on a line with Matt Martin and Brown in an otherwise full NHL lineup in a 5-1 preseason win against the Canadiens on Monday. Babcock has also mentioned Eric Fehr and Ben Smith as candidates.
Most intriguing addition
Marleau, 38, remains among the fastest players in the League, and that should allow him to fit in well with the Maple Leafs' high-speed style. He had 46 points (27 goals, 19 assists) in 82 games for the Sharks last season. Babcock said he feels Marleau can score 20 goals, but he is most excited about his ability to play on any of the top three lines. In the preseason, Marleau has been used on the power play and penalty kill as well.