(Reuters) - Washington Nationals Bryce Harper was crowned National League Rookie of the year on Monday.

Harper had a brilliant rookie campaign, but the 20-year-old faced some stiff competition for the NL award from Arizona Diamondback pitcher Wade Miley who picked up 12 first-place ballots to finish a close second. Harper finished with 112 points while Miley collected 105.

A versatile talent who played all three outfield positions, Harper batted .270 with 22 home runs, 59 RBI, 56 walks and 18 stolen bases in 139 games.

"Upon joining us, Bryce's impact on our lineup and defensive alignment was immediate and came at a great time of need," Mike Rizzo, Nationals general manager and executive vice president of baseball operations said in a statement.

"His sustained energy and enthusiasm throughout the summer played a big part in fueling our division title."

(Reporting by Steve Keating in Toronto; Editing by Julian Linden)