"He's playing an awful lot of matches at the moment so
there's a disappointment for me," Kerr told the Irish News.
"Manchester United can still make the case that he needs
those breaks during international matches but there's a
frustration for me and I would imagine for many other Irish
people.
"There's only a few games a season - the qualification
matches. In the total percentage of matches per season, it's
not a fierce number of games. I just can't understand it. I
have difficulty in my own mind as someone who never got to
play one international match.
"I have a huge problem with dealing with somebody saying: ‘I
want to concentrate on my club career.’ I think the players
that do retire early will have regrets in the future.”