In 2005–06, Doyle continued to play regularly, captaining the side on a number of occasions since Christmas, notably in the 2–0 home win over Wolverhampton Wanderers. This came in his first match after a suspension for his dismissal in the previous home game against Crewe Alexandra for arguing with the referee. Doyle was named permanent captain of Coventry by Iain Dowie. Doyle was part of the Coventry team that beat Manchester United in the League Cup at Old Trafford, which remains one of the most famous League Cup upsets in recent years.