Garry Park scored a half-century and took two wickets to help Derbyshire to a 59-run victory over Durham at the Riverside.
The visitors made 175 for six with Park contributing 50 to a stand of 95 in 10 overs with Australian left-hander Chris Rogers.
Park's two wickets then helped his side dismiss Durham for 116 in 15.3 overs.
Tom Lungley struck with his first two balls after returning from a groin injury suffered in the first match of the season.
He forced former team-mate Michael Di Venuto to play on, then yorked home captain Will Smith.
Another ex-Derbyshire man, Ian Blackwell, edged a big drive at Graham Wagg to the wicketkeeper, but from 22 for three Phil Mustard and Kyle Coetzer gave Durham hope with a stand of 49 in six overs.
Mustard then drove a full toss from Tim Groenewald straight to extra cover and Coetzer had his off stump rattled when trying to hit leg-spinner Mark Lawson through square leg.
After three seasons with Durham, Park chose to leave during the winter and has played in every match so far for Derbyshire.
He showed what an adaptable player he is as he outpaced his partner, despite Rogers outscoring him 3-0 in sixes.