WESLEY CHAPEL — Cayla Barnes should be playing her freshman season at Boston College and working toward her dream of playing for the U.S. women's hockey team.Instead, she's scoring for the team."It's pretty crazy," Barnes said Wednesday after scoring the first goal in the United States' 4-2 victory against Canada in the round-robin portion of the Four Nations Cup at Florida Hospital Center Ice.Barnes, a defenseman who at 18 and 5 feet 1 is the youngest and smallest player on the roster, also scored Tuesday in the United States' 8-2 win against Finland."She's skilled beyond her years," said defenseman Emily Pfalzer, herself a Boston College product who hosted Barnes last winter during Barnes' recruiting trip.The two could be teammates in February during the Olympics in PyeongChang, South Korea.There are 24 players on the U.S. roster. The roster has to be trimmed by one for the Games. Given her experience, Barnes has an outside chance to make it. Also, she adds scoring punch to the defense, which is always helpful, and U.S. coach Robb Stauber said Tuesday that Barnes is a member of the team because she earned it.That was a bit of a shock to the native of Eastvale, Calif. Barnes attended the selection camp in April at Florida Hospital Center Ice. She made enough of an impression that she was told to keep working and keep training because you never know what might develop."Never did I expect to be called up this late," Barnes said. "I was completely shocked, to be honest."The United States, 2-0 in the tournament, used goals by Barnes and Megan Bozek to take a 2-0 first-period lead against Canada (1-1).Canada's Rebecca Johnson made it a one-goal game with a power-play goal early in the second.A power-play goal by Kendall Coyne pushed the U.S. lead to 3-1. But Canada never goes away easily, and a shorthanded goal by Meghan Agosta made it a one-goal game again.That was until Alex Carpenter scored on the power play less than 40 seconds later to basically put the game away.The teams look to be headed to another championship showdown Sunday at Amalie Arena.The Four Nations Cup, the last major international tournament before the Olympics, also includes Finland and Sweden. The United States has won the event six times, including the past two. It has placed second to Canada nine times.The United States and Canada are the two best teams in the world, separated by a razor-thin margin.The Americans were ready Wednesday, controlling the action for the first and third periods. They outshot Canada 20-22 and played better on special teams in a game that produced 14 power plays. The United States was 3-for-5 with the man advantage while killing off eight of nine penalties.The United States, which has finished runnerup to Canada at the past two Olympics, changed its pre-Olympic schedule this time. It passed on games against college teams and scheduled a series of games against Canada. The teams met in Boston in October and will play twice more before heading to PyeongChang.Part of that move was to face better competition."Obviously it' a good benchmark to see how we're progressing," Stauber said. "(Canada is) extremely tough competition, and I suspect they feel the same (about the United States)."Scheduling Canada in exhibition games is common, Stauber said. It has happened before prior Olympics, so he doesn't view it as a detriment."To be honest, there's very little tendencies you're going to take out of these games," he said. "Both teams are going to play hard. … Our goal is that it all comes together in a way that gives us a real good chance of getting the result we want."Finland ralliesFinland scored three times in the third for a 3-1 victory against Sweden in the first game Wednesday.Sweden (0-2) held a 1-0 lead after Johanna Fallman scored in the second.Finland (1-1) responded with goals by Susanna Tapani, Linda Valimaki and Michelle Karvinen.Finland plays Canada at 3 p.m. Friday. The United States plays Sweden at 6:30. Both games are at Florida Hospital Center Ice.