Tolvanen, a 5-foot-10, 170-pound right wing, plays for Sioux City in the United States Hockey League, and is second in the USHL with 16 goals and 27 points. Vesalainen (6-3, 207), has one goal in nine games with HPK in Liiga, Finland's top professional league.
Heiskanen (6-0, 170) has seven points in 25 games with HIFK in Liiga. Valimaki (6-1, 204), who plays for Tri-City in the Western Hockey League, is fourth among WHL defensemen with 12 goals and 35 points in 32 games.
Five players who helped Finland win the gold medal at the 2016 WJC in Helsinki return: goaltender Veini Vehvilainen, defenseman Olli Juolevi (Vancouver Canucks) and Vili Saarjarvi (Detroit Red Wings), and forward Kasper Bjorkqvist (Pittsburgh Penguins) and Julius Nattinen (Anaheim Ducks).
The final players cut were defensemen Otto Leskinen, Jarkko Parikka and Robin Salo, and forwards Jouka Juhola and Aaro Vidgren.
Forwards Patrik Laine (Winnipeg Jets) and Jesse Puljujarvi (Edmonton Oilers) played on the top line at the 2016 WJC and remain eligible for the tournament but are staying with their NHL teams.
Finland will play in Group A at the WJC, along with Czech Republic, Denmark, Sweden and Switzerland. All its preliminary-round games will be played at Bell Centre in Montreal, starting against Czech Republic on Monday (5 p.m. ET; NHLN).
The tournament runs through Jan. 5.
FINLAND WORLD JUNIOR CHAMPIONSHIP ROSTER
Goaltenders --Karolus Kaarlehto, Tuto, FIN-2 (2017 draft eligible); Markus Ruusu, JYP 2, FIN-2 (Dallas Stars); Veini Vehvilainen, JYP, FIN (2017 draft eligible)
Defensemen --Miro Heiskanen, HIFK, FIN (2017 draft eligible); Olli Juolevi, London, OHL (Vancouver Canucks); Jesper Mattila, Boston College, H-EAST (2017 draft eligible); Juho Rautanen, Jokerit, RUS (2017 draft eligible), Vili Saarijarvi, Mississauga, OHL (Detroit Red Wings); Urho Vaakanainen, JYP, FIN (2017 draft eligible); Juuso Valimaki, Tri-City, WHL (2017 draft eligible)
Forwards --Kasper Bjorkqvist, Providence, H-EAST (Pittsburgh Penguins); Henrik Borgstrom, Denver, NCHC (Florida Panthers); Otto Koivula, Ilves, FIN (New York Islanders); Janne Kuokkanen, London, OHL (Carolina Hurricanes); Joona Luoto, Tappara Jr., FIN-JR (2017 draft eligible); Julius Mattila, Boston College, H-EAST (2017 draft eligible); Julius Nattinen, Windsor, OHL (Anaheim Ducks); Petrus Palmu, Owen Sound, OHL (2017 Draft eligible); Aapeli Rasanen, Sioux City, USHL (Edmonton Oilers); Arttu Ruotsalainen, Assat, FIN, (2017 draft eligible); Eeli Tolvanen, Sioux City, USHL (2017 draft eligible); Teemu Vayrynen, TPS, FIN (2017 draft eligible); Kristian Vesalainen, HPK, FIN (2017 draft eligible)
