Curtain won two medals at the
1996 World Outdoor Bowls Championship; a silver in the triples and a bronze in the fours. He won the
gold medal with
Rowan Brassey and
Peter Belliss in the
men's triples at the
2000 World Outdoor Bowls Championship in
Johannesburg. Curtain also represented New Zealand at the
2002 Commonwealth Games. He won five medals at the
Asia Pacific Bowls Championships of which four were gold. He won the 1997 & 2008 pairs title and the 1993, 1994, 1996, 1997 & 2004 fours title at the
New Zealand National Bowls Championships when bowling for the various bowls clubs. ==References==