"It is an unbelievable recovery," Kirwan, said. "It gives the players a lift, but it gives him a lift as well."
Kirwan added: "He's been absolutely fantastic and a joy to have in the team. He contributes as much off the field as he does on it. We have missed his experience at times but he has been working hard with Bryn [Hall] and now Jamison."
Weepu's neurologist and cardiologist made the decision to let him train with a view to playing a week on Friday. A Blues statement yesterday said he had made a full recovery.
The news is said to be not as good for first-five Baden Kerr, who is set to miss the season without playing a match. After cracking a thumb in a pre-season hit-out he broke a couple of fingers in a club game. The Counties Manukau player, a standout in their Ranfurly Shield exploits last year, has had an operation and is understood to face a long lay-off.
Kirwan, who has Simon Hickey and Chris Noakes as his first-five options, with Benji Marshall as a back-up, has big decisions to make this week as to his inside-back combination to face the Hurricanes, a team running into some form, but, like the Blues, cursed by inconsistency.
Hickey was targeted by the Brumbies in the 26-9 loss in Canberra which turned into a painful learning experience for the 20-year-old. The Blues' bye has given him time to think things through but Kirwan could go for the more experienced Noakes to lead the team around the Cake Tin.
Kirwan acknowledged the importance of the match with the Hurricanes, who are also coming off a bye and will be preparing for their first match since being told coach Mark Hammett will leave at the year's end.
"We know what we're going to get - they will throw everything at us," Kirwan said. "It's a big challenge for both franchises."