Jesse Ryder made a superb return after seven months out by scoring his 14th first-class century for Otago at the Basin Reserve in Wellington.
The 29-year-old was playing his first competitive match since March when he was badly injured in a serious assault outside a bar in Christchurch and then banned for six months for a positive drugs test.
But he showed few signs of rust playing for his new team against the Wellington side he used to feature for, bringing up three figures just before lunch on day two with a boundary.
Ryder resumed on 48 and needed 151 balls to reach three figures in an innings which included 19 fours - he was eventually dismissed by Andy McKay for 117.
His first big aim is to secure a return to the New Zealand fold and add to his 75 appearances in Test, limited-overs and Twenty20 internationals - he made his debut in 2008.
He was banned earlier this year for a positive test for a substance contained in weight-loss pills.
Ryder's innings helped the Volts to a formidable 534-9 declared, with Aaron Redmond hitting 154 and Michael Bracewell contributing 107, but the placid pitch did little to help the Volts bowlers as Wellington cruised to 217-2 by stumps.