While playing junior lacrosse, he won back-to-back Minto Cup championships in 1948 and 1949.
An accomplished box lacrosse player, Nieuwendyk led the Whitby Warriors to the 1984 Minto Cup national junior championship before focusing exclusively on hockey.
World Cup | FIFA World Cup | 2010 FIFA World Cup | FA Cup | 1978 FIFA World Cup | 2006 FIFA World Cup | Davis Cup | Stanley Cup | Rugby World Cup | Cricket World Cup | 1986 FIFA World Cup | 1982 FIFA World Cup | Sprint Cup Series | 2007 Cricket World Cup | 2011 Rugby World Cup | 2002 FIFA World Cup | League Cup | Scottish Cup | Grey Cup | Football League Cup | 1998 FIFA World Cup | Challenge Cup | 2014 FIFA World Cup | Ryder Cup | 2003 Rugby World Cup | UEFA Cup Winners' Cup | Melbourne Cup | America's Cup | 1994 FIFA World Cup | 1990 FIFA World Cup |