WILMINGTON, Mass. -- As a 20-year-old rookie, David Krejci played 42 games for the Boston Bruins before registering his first NHL goal.

Krejci, now 28, has scored 115 goals in 527 career games. Current Bruins rookie David Pastrnak has played only seven games in the NHL and has three points, including two goals. The 18-year-old forward notched his first two goals in a 3-1 win over the Philadelphia Flyers on Saturday at Wells Fargo Center.

David Pastrnak, an 18-year-old rookie, has impressed teammates with his poise and confidence. Len Redkoles/NHLI/Getty Images

Krejci assisted on one of those goals. It was a nifty passing play between the two, and they made it seem as though they've been linemates for years. Both natives of the Czech Republic, Krejci and Pastrnak have been on the Bruins' top line, along with Brad Marchand, the past two games. Coach Claude Julien has tried many different line combinations this season in an attempt to generate more scoring.

It's a small sample size, but Krejci could have a new right wing.

"He's very skilled, but we all knew that in training camp," Krejci said. "He's just getting more comfortable at the NHL level, and I'm sure the two goals helped him. It's fun to play with him. He's only 18, but he's got skill like a 30-year-old. He knows he has to get better in some areas, but we all do. As long as he's working on those things, then he's going to have a good career."

Now that Pastrnak has played seven games, he can play only two more before a decision needs to be made on his future. Once he reaches 10 games with the Bruins, Pastrnak's NHL entry-level contract is locked in for this season. The Bruins host the Tampa Bay Lightning on Tuesday night at TD Garden, then the New York Rangers on Wednesday.

If the Bruins decide to send Pastrnak back to Providence of the AHL before he reaches that threshold, his entry-level contract will not begin until next season.

Pastrnak has been dynamic to watch, but there is some risk-and-reward to his game. Bruins coach Claude Julien said after the team's practice Monday at Ristuccia Arena that it has not been determined whether Pastrnak will stay with the team for the remainder of the season.

"He's played well," Julien said. "I really liked his last game -- not because of the goals, but how he's playing. He's going to the net. He's going to the corners and doing a lot of things. Defensively, you can see that he understands what he has to do, so he's certainly trending in the right direction."