WASHINGTON (AP) — Anthony Mantha had a two points in his Washington debut, Alex Ovechkin scored the 728th goal of his NHL career and the Capitals beat the Philadelphia Flyers 6-1. The East Division-leading Capitals went 3 for 3 on the power play as part of another offensive outburst. Mantha had a goal and an assist after a trade from Detroit. Ovechkin scored his team-leading 22nd goal of the season. The Capitals have won three in a row. The Flyers lost for the sixth time in eight games.