Dagg, 30, has played 66 tests, the last in September last year when he started on the right wing against Argentina in New Plymouth.
Dagg's degenerative knee condition, plus a concussion a week after his return to the Crusaders in a bad mid-air challenge against the Brumbies in Canberra in April, has severely curtailed his opportunities since.
He wasn't required for the Crusaders against the Highlanders last weekend, despite being fit, so will relish the chance against the Blues while probably hoping he isn't cursed by a new problem.
With David Havili, George Bridge, Seta Tamanivalu and Manasa Mataele as outside back options, Dagg will not have an easy task winning game time for the rest of the season, and that's exactly what he needs to have any chance of impressing All Blacks coach Steve Hansen.
Havili, capped three times for the All Blacks last year, played his best game of the season for the Crusaders in their big win over the Highlanders in Christchurch last weekend, while Bridge has scored 12 tries in 14 games and Tamanivalu is a robust right wing who can easily slot into the midfield.
Crusaders coach Scott Robertson this week gave an insight into his selection difficulties when he said: "David has been absolutely outstanding, that's a tough call.
"Dagger [Dagg] deserves an opportunity. He is a great player and has been great for us. It's his chance to take an opportunity."
Dagg was a breakout star at the 2011 World Cup, but has had a terrible run with injuries, including a dislocated shoulder and a torn quadriceps. He has generally impressed in the black jersey and can play right wing just as well as fullback.
But he probably needs to find something special to displace the likes of Ben Smith, Jordie Barrett, Rieko Ioane, Nehe Milner-Skudder and Waisake Naholo as an option in the All Blacks back three and he doesn't have long to find it.