Michael Keane, twin brother of young United striker Will, is a defender who has made great strides at the club.
Michael, initially a full-back, did not appear for United's Under-18s in 2009/10, but he did make his debut for the Reserves against Wigan in April 2010. Quite small in stature for his age, the progress made after he caught up in terms of physical development has been very impressive as he became a key figure in the successful FA Youth Cup-winning team of 2011.
Graduation into Warren Joyce's Reserves followed and he slotted in effortlessly either at the heart of the defence or full-back, earning praise from his coach for his consistent endeavour on the training field.
As a result, Keane was rewarded with a first-team debut during the Carling Cup win at Aldershot.
Since then, he has emerged as a central defender of some repute and an England Under-21 regular after opting to represent the country of his birth rather than Republic of Ireland. A former Reserves Player of the Year, Keane was used more than anybody else at that level in 2012/2013 and contributed five goals.