Nine minutes later, Fitzgerald was on the ice for Latvia's only goal of the game. As a Team USA pass deflected out of the zone to center ice, Fitzgerald was beaten back down the ice by Renars Krastenbergs, who made a nice backhand move for the high-glove finish to knot the game 1-1 at the first intermission.
After committing a turnover in the first minute of the middle frame that caused him to race back and take a hooking penalty, Fitzgerald settled in the rest of the way with improved positional play and some tenacity around his net after the whistle.
The Americans as a whole settled in as well with improved discipline and simpler passing to dominate the remainder of the game.
White got the club back on track with a marker off the break, taking a nice headman feed from Tage Thompson (STL) and skating in to bury the game-winning goal at 6:29 of the second period.
Team USA headed to the second intermission with a 3-1 lead after Keller potted his first of the night at the left post in the game's 39th minute.
Keller struck again with a beauty at 12:19 of the third period, cutting to the middle of the ice and firing a perfectly placed shot against the grain into the top corner.
The Americans weren't done as Bracco stroked an uncontested shot through Mareks Mitens' wickets to make it a 5-1 game with 2:19 left on the clock.
Greenway put the cherry on top, racing into the slot to swat home a rebound with 39.9 seconds remaining for the fifth unanswered goal to seal the victory.
Next up for the United States is a matchup with Slovakia on Wednesday at Air Canada Centre.
For more on all the youngsters in the Sabres pipeline, check out Kris Baker's website, SabresProspects.com. You can also follow him on Twitter (@SabresProspects) for in-game updates throughout the week on any Buffalo prospects that are in action.
Buffalo wil host the 2018 IIHF World Junior Championship. For more information including ticket packages, visit BuffaloWorldJuniors.com.