Coach Todd McLellan said Puljujarvi (6-foot-4, 203 pounds) can step into a top-six role immediately, a factor in trading left wing Taylor Hall to the New Jersey Devils.
"I think Jesse is going to dictate his entry into the League and the pace of it," McLellan said. "He's a very highly skilled player that's played with men. When you draft a player from a junior team over here or a U.S. college, they've been playing with young men. Jesse has played in the pro league over there (Finland) against men, and I think that gives him a little bit of a head start."
Projected NHL arrival: This season
2. Drake Caggiula, LW How acquired: Signed as free agent, May 7, 2016
Last season:University of North Dakota (NCAA): 39 GP, 25-26-51
Caggiula, 22, helped North Dakota win the 2016 NCAA championship and was named the tournament's most outstanding player. In four seasons at North Dakota, Caggiula had 127 points (62 goals, 65 assists) in 162 games.
A skilled forward, Caggiula (5-9, 185) could push for a roster spot at training camp but is likely to start the season with Bakersfield of the American Hockey League. He had a number of suitors coming out of college but felt the lure of playing in a new arena with Connor McDavid.
"I think [professional hockey] is a little different than college hockey; everyone is bigger, faster, stronger, smarter," Caggiula said. "There is going to be an adjustment period, but at the same time, I think I'm a quick learner and I hope I can learn as quick as possible and get accustomed to the pro game, and hopefully it turns out well for myself."
Projected NHL arrival: Next season
3. Laurent Brossoit, G How acquired: In trade with Calgary Flames, Nov. 8, 2013
Last season: Edmonton: 5 GP, 0-4-1, 3.61 GAA, .873 SV%; Bakersfield (AHL): 31 GP, 18-9-3, 2.66 GAA, .920 SV%
Brossoit, 23, is projected to be the Oilers goaltender of the future and was one of the principals in a trade with the Flames involving defenseman Ladislav Smid. Edmonton has been careful not to rush the prospect, allowing him ample time to develop in its system.
The Oilers are familiar with Brossoit's capabilities. He helped Edmonton of the Western Hockey League win a championship and a berth into the Memorial Cup in 2013.