United were top of the league as September began and, despite a couple of blips, it was another outstanding month for the U's.
The month began with the transfer deadline day signing of Kyle Edwards from Ipswich Town, but the following day the side suffered their first home defeat of the campaign as Greg Leigh's first goal for the club wasn't enough to stop Port Vale winning 2-1, with Oxford having two players - including Leigh - sent off.
Three days later, the first Bristol Street Motors Trophy group game entailed a visit to Sixfields, where Edwards showed United fans what he was capable of with an impressive display, including scoring the goal that gave Oxford the lead after Northampton had converted an early penalty, negated when Mark Harris scored the equaliser, also from the penalty spot. Harris also scored Oxford's third, but the headlines were reserved for Louis Griffiths, who came off the bench two days after his 16th birthday to become the club's youngest-ever first-team player.
A long journey up the M6 to Fleetwood garnered another three points for the Yellows, as Stan Mills scored his first goal for the club, with Edwards and Billy Bodin also on target. The Cod Army were unable to breach the Oxford defence to leave a 3-0 scoreline in United's favour.
A midweek Trophy group match defeat to Milton Keynes Dons did little to dampen the side's confidence and there was no surprise when Exeter City's visit to the Kassam Stadium resulted in another 3-0 win for the U's. Ruben Rodrigues opened the scoring with his first United goal, and the result was sealed thanks to two late penalty conversions for Cameron Brannagan.
The last game of the month was also the game of the day, as second-placed Oxford travelled to third-placed Stevenage. It was to be a Greg Leigh masterclass, the birthday boy scoring two of United's three goals, including an equaliser after the home side had taken an early lead. In the second half, Leigh struck again with a specatular volley in front of the visiting fans to give United the lead before captain Elliott Moore headed home a Josh Murphy cross to end the month on a high.