The 24 year old has had a fantastic season with United and has prompted Neil Warnock to say "dead cert" to play at the highest level about the Blades keeper.
This has alerted Irish chiefs, who watched him make a World Class save in the 2-1 victory over Liverpool to put him in line for a International call-up.
A unknown source told Sheffield Star "He's defiantly in the frame for the forthcoming friendly with Scotland. He's been talked about for a while now but they want to see how he does against Premiership opposition."