Yorkshire's dismal Championship form carried over to the Friends Life t20 as they lost to Warwickshire by five wickets.
Will Porterfield (64) led the chase towards their 161 total, reaching his 50 in 21 balls, and Yorkshire's pacemen came in for some harsh treatment as Tim Ambrose (26) and Rikki Clarke (21) saw the visitors over the line.
At Old Trafford, Worcestershire Royals' Moeen Ali hit six boundaries off as many balls as they chased Lancashire's 154 for 7, but spinner Gary Keedy turned the match as the home side won by eight runs.
A career-best 89 not out by South African Roelof van der Merwe helped Somerset surpass Kent's modest 163 for 8.
Three wickets from captain Matthew Hoggard helped Leicestershire to a six-wicket victory over Northamptonshire after the home side made 135 for 5.
Nottinghamshire captain David Hussey's brisk 60 helped post a 38-run victory over Derbyshire.