Will Rhodes hit a career-best 142 not out as Warwickshire made a strong start in their Bob Willis Trophy match at Worcestershire.
The captain put on 165 for the second wicket with Sam Hain (55) to help Warwickshire to 228 for three on the first day at New Road.
Rhodes’ runs came off 263 deliveries and included 15 fours.
Glamorgan’s Callum Taylor scored a brilliant 106 from just 94 deliveries as he made a stunning first-class debut against Northamptonshire.
The 22-year-old hit 11 fours and six sixes to ensure respectability for the Welsh side, who were bowled out for 259 at Wantage Road. Nick Selman made 42 but only three other Glamorgan players made double figures as Brett Hutton and Jack White claimed four wickets apiece.
Northants were 82 for one in reply at the close.
George Bartlett hit an unbeaten century as Somerset took charge against Gloucestershire at Taunton.