As the side finished 12th and reached the Quarter-Finals of the EFL Trophy, his team-mates were clearly impressed with his contributions, seeing him named as the club’s Players’ Player of the Year at their end of season awards ceremony.
A sign of things to come, perhaps.
With Robinson strengthening the U’s with the likes of Matty Taylor and Tariqe Fosu-Henry, the club had a clear plan to press forward with their vision, and progressing from Sky Bet League One.
Brannagan would be the focal point of the midfield, with things slowly falling into place for Oxford after a less than impressive start to the season, which saw them only win once between the start of the season on August 3 until their second win on September 14.
But bad starts are often forgotten after memorable endings, and the young man from Salford certainly played his part in helping the side reach the 2019/20 Sky Bet League One Play-Off Final.
After seeing off Portsmouth over two Semi-Final legs - which included a tense penalty shoot-out - the U’s would travel south for their date with destiny against Wycombe Wanderers at Wembley Stadium.
Unfortunately, there would be no fairy tail ending for Brannagan and teammates this time around, as the Chairboys made history to reach the Championship, leaving behind a dejected - but not disheartened - Oxford side.
Attention has now turned to the new season, however one important question is yet to be answered - would Cameron Brannagan be wearing yellow in the 2020/21 campaign?
With Leeds United showing a strong interest in the midfielder, could the bright lights of the Premier League tempt the youngster into moving back up north?
Thankfully for U’s fans, Brannagan answered those questions last Friday by signing a new long-term deal with the club.
“I’m more than happy to be here,” he told the club. "All I want is to win promotion and be successful with this club.”
“The club is set up for that and I have loved my time here so far. I owe them a lot because they took a chance on me as a young player and I want to repay that.”
There is clearly a buzz around the place after reaching the Play-Off Final last season, but the excitement will not doubt have gone up a notch with the news that their midfield talisman will be staying on for the foreseeable.
One thing is for sure, Oxford United have one of the most talented youngsters in the EFL within their ranks.