Polu began his career by breaking into the North Harbour provincial side, he was spotted for the Samoan national team and in 2006 was selected to nationalise to play for his parents country, representing composite side Pacific Islanders as a Samoan, having been unwanted for the 2004 tour due to the presence of So'oialo.

A solid tour as Mosese Rauluni's understudy lead to several offers from European clubs, but Polu declined and remained true to his North Harbour contract and returned home.

Having travelled north to France for the world cup Polu joined RC Toulon on a short-term deal.

When his Harlequins contract finished in the summer of 2009 he joined the Bay of Plenty Steamers in the Air New Zealand Cup.

[3] It was announced in local media in Devon, England that Polu will be leaving Exeter Chiefs at the end of the 2012/13 season.