Spinner Ben Twohig returned his best Championship figures for Worcestershire Seconds on the opening day of their clash with Lancashire Seconds at Southport during which 16 wickets fell.
The slow left armer collected his first five wicket haul in the competition on his way to a final analysis of 6-73 from 18.4 overs after Lancashire had elected to bat.
Twohig had taken 5-33 at the start of the campaign against Somerset at New Road but that was in a three-day friendly encounter.
Lancashire were indebted to an unbeaten century from Liam Livingstone whose 118 came from 141 balls with seven sixes and seven fours.
Twohig helped bring about a collapse from 155-3 to 259 all out while fellow spinners Shaaiq Choudhry (2-64) and George Rhodes (1-17) were also amongst the wickets.
But Worcestershire struggled for runs after an opening stand of 37 between Rhodes and Alex Hepburn.
With Alex Gidman run out for four, they ended the day on 110-6.
The opening session of the day was a slow affair and there were 10 maidens bowled in the first 22 overs.
Luis Reece and Livingstone started to build a partnership which was broken on 40 when Reece was caught at first slip by Hepburn off the bowling of Rhodes in the 27th over.
Lancs went into lunch on 118-3 off 33 overs.
Twohig bowled spin from one end for the whole of the afternoon session despite his opening two overs costing 18 runs and three of his wickets came via catches by Rhodes at first slip.
Livingstone proved difficult to remove and ran out of partners as the Lancashire innings was polished off by tea.
But overs before tea, Shaaiq Chowdhry, who had just bowled six overs in tandem with Twohig, left the field with a side strain to receive treatment.
After tea Worcs openers Rhodes and Hepburn looked in fine form until the latter was caught at mid-wicket for 18.
This proved to be as fatal a fielding position for Worcsestershire as first slip had been for Lancashire as two more catches were to be taken there before the day was out.
Gidman was unlucky to be run out by a direct throw from Josh Bohannon having faced just five balls.
Alexei Kervezee found the boundary on regular occasions before being caught behind for 21 from 23 deliveries.
But it was wicket keeper Calvin Dickinson and wicket taker Twohig who were left to bat out the overs to close of play.
Lancashire Seconds – first innings
Reece c Hepburn b Rhodes 36
Dearden b Whiles 10
Procter b Choudhry 5
Livingstone not out 118
Jones c Rhodes b Twohig 46
Bohannon c Rhodes b Twohig 10
Lamb b Choudhry 4
Shafiq c Rhodes b Twohig 0
Gowers c and b Twohig 3
Kerrigan b Twohig 14
Edwards c Dickinson b Twohig 3
Total (all out) 259 in 69.4 overs
FOW: 36, 46, 86, 155, 167, 194, 195, 201, 243, 259
Worcestershire Seconds – first innings
Rhodes c Houghton b Lamb 19
Hepburn c Dearden b Lamb 18
Gidman run out (Bohannon) 4
Kervezee c Gowers b Procter 21
Dell b Procter 10
Hammond c Bohannon b Kerrigan 6
Dickinson not out 12
Twohig not out 4
Total (for 6 wickets) 110
FOW: 37, 41, 43, 70, 85, 87
Bowling: Lamb 2-27, Procter 2-40, Kerrigan 1-5