Wayne Rooney window opened on 10 July. On 14 July, in a 3–1 win against the Vancouver Whitecaps, Rooney made his debut for United, coming on for Darren Mattocks in the 59th minute, and assisted a goal by Paul Arriola. Rooney's debut came on the unveiling of DC United's new $400 million stadium, Audi Field. After three games, Rooney was named captain by manager Ben Olsen. His first goal for the club came on 28 July in his first game with the armband, slotting past his former Manchester United teammate, goalkeeper Tim Howard, securing a 2–1 win over the Colorado Rapids at
Wayne Rooney scored his 100th Premier League goal in a 3–1 win over Arsenal for the first time in the league at Emirates Stadium, notably his first Premier League goal also came against Arsenal. On 16 February 2010, Rooney hit his first European goals of the season, scoring two headers in the 3–2 away win against Milan in Manchester United's first ever win against them at the San Siro. On 28 February 2010, he scored another header against Aston Villa (his fifth consecutive headed goal) which resulted in Manchester United winning the League Cup final 2–1. In the second leg of United's