Making the cut
With Kyrou likely moving into the top six to take Perron's spot, the Blues have a vacancy at third-line forward. Figuring out who will slot in there will be a focus of training camp, and it could include Neighbours or Bolduc. The third defense pair is also in question. The top two pairs appear locked in, with Nick Leddy, Colton Parayko, Torey Krug and Justin Faulk, but the Blues have eight defensemen on one-way contracts and there will be some battles in camp.
Most intriguing addition
Though Neighbours isn't a lock to make the opening night lineup, it appears he's trending in that direction. The 20-year-old played nine games in the NHL last season and had two points (one goal, one assist). He played the rest of the season with Edmonton of the Western Hockey League, where he was captain and led the team to the WHL championship after he had 45 points (17 goals, 28 assists) in 30 regular-season games. St. Louis' first-round pick (No. 26) in the 2020 NHL Draft could help make up for the loss of Perron.
Biggest potential surprise
The likeliest scenario does not see Bolduc making and sticking with the NHL roster this season, but it remains a possibility for the 19-year-old center. He had 99 points (55 goals, 44 assists) in 65 games for Quebec of the Quebec Major Junior Hockey League last season, which is where he could end up this season. But he has a great shot and the talent and skill to be very successful in the League. The pressing question is when.
Ready to break through
It looked like last season was going to be the one for defenseman Scott Perunovich to make his mark, but injuries got in the way. Should the 24-year-old remain healthy, the Blues could use him in place of Marco Scandella on the third pair and the power play. Perunovich had 22 points (three goals, 19 assists) in 17 games for Springfield of the American Hockey League and six assists in 19 games with the Blues last season.
Fantasy sleeper
Ivan Barbashev, C/LW (fantasy average draft position: 176.3) -- He was fifth on the Blues with NHL career highs in goals (26) and points (60) last season and had their third-most 5-on-5 goals per 60 minutes (0.94; minimum 40 games). Barbashev could have an even higher ceiling if he sees more top-six and power-play usage after the departure of Perron and maintains his high NHL career shooting percentage (19.2 in 351 NHL games). -- Pete Jensen