After his move from the Crusaders to France, following his well-publicised battle with alcohol when the 2011 World Cup finished, he has little chance of returning to Christchurch. The reigning champion Highlanders are unlikely to need another wing, and the Chiefs and Hurricanes appear to have a settled squad - which leaves the Blues.
New Zealand Rugby chief executive Steve Tew said Guildford's return to Super Rugby hadn't been discussed. "I don't know that he's on anyone's list but he might be," Tew said.
"I suspect there are, in most of the Super teams, still three or four slots available in the squads and certainly in the wider training groups.
"The Blues are still looking for a number of players so I would've thought Zac, and any number of players, are playing over the next few weeks with the possibility of a professional contract in this country."
All Blacks analyst Alistair Rogers, a Welshman and former professional player, has been appointed by the Blues as their new defence and skills coach. "Coaches and players who've worked with him spoke very highly of him ... It's an important area and I wanted a very specific person. He fits that profile," Umaga said.