Signed on a permanent contract after arriving on a short-term basis towards the end of the 2016/17 season.
One of four keepers with the Reserves squad at the training camp in Austria - with Kieran O'Hara, Max Johnstone and Ilias Moutha-Sebtaoui - and likely to push for a place in the Under-23s and UEFA Youth League squad. Formerly with Leeds United, he produced some outstanding performances when thrust into the Reds' Under-18 team to earn a deal over the course of the summer.
Date of birth
London calling - a United XI Gallery
Following Aaron Wan-Bissaka's move from the capital, here's a line-up of other Reds born there.
United's Champions League debutants Gallery
Mason Greenwood is the 11th Red to make his bow in the Champions League. Can you recall the others..?