Yorkshire opened their Royal London One-Day Cup programme with a severe thrashing at the hands of Worcestershire at Headingley.
Batting first on winning the toss, Jason Gillespie's side were bowled out for a listless 170 and Worcestershire charged to their target for the loss of three wickets with 24.3 overs remaining.
Openers Joe Leach and Tom Kohler-Cadmore had blasted 107 together off a mere 12.4 overs before Daryl Mitchell and Alexei Kervezee finished the job
It was a doubly satisfying result fo r the visitors' Bradford-born director of cricket Steve Rhodes, whose 23-year-old son, George, made his first team debut for the county and pegged Yorkshire back with 10 overs of well-controlled off-spin that brought him two wickets.
Liam Dawson hit 68 not out from 40 balls to lead Hampshire to a five-wicket win with three balls to spare in a rain-affected match at Radlett.
Brendon McCullum had produced a brilliant 74 on his Middlesex one-day debut, while Hampshire spinner Mason Crane took four for 80 as the hosts made 295 for eight.
Sean Ervine clubbed two sixes and four fours in a 32-ball 45 and it was his fourth-wicket stand of 89 in nine overs with Dawson which proved decisive in their revised chase of 202.
Ryan Pringle's brilliant maiden century for Durham was in vain as Ben Slater's first limited-overs hundred powered Derbyshire to a seven-wicket victory at Derby.
Pringle's superb 125 from 101 balls was the highest score by a Durham number eight in List A matches and saved his side from humiliation after they had collapsed to 75 for seven.
Usman Arshad helped Pringle add 62, a Durham eighth wicket record in List A cricket, as the visitors recovered to 216 b ut those efforts were countered by opener Slater who marked his first 50 overs game for Derbyshire with 119 from 137 balls as the Falcons eased home with 8.2 overs to spare.
In the day's other game, Warwickshire recorded an emphatic nine-wicket victory over Leicestershire at Edgbaston.
After restricting the visitors to 237 for nine on a good batting pitch with a very short boundary on one side, the Bears cruised to victory with 54 balls to spare.
It was game over after openers Sam Hain (105 not out) and Will Porterfield (75) added 169 in 29.2 overs.