Easterby made his test debut in the same year as Peter Stringer but has always trailed the Munster scrum-half in the Irish pecking order. 21 out of his 27 appearances before the 2005 Six Nations Championship were made as a substitute. He enjoyed a stint with London Scottish after enjoying his most successful part of his career with Rotherham in the English Premiership and with Leinster in Ireland. He retired after the 2006/2007 season however made his comeback against Edinburgh Rugby on the 15 December 2007