Released Manchester United defender Luke McCullough is impressing at Doncaster Rovers.

McCullough is currently trialling with the Championship new boys.

Rovers boss Paul Dickov told the South Yorkshire Times: "Luke for a 19-year-old kid at the back he's got a lot of maturity. He's calm, probably a bit too calm at times. All three have got a lot of potential and we'll keep having a look at them."