|LV= County Championship - Division One, Scarborough|
|Close of play, day one: Worcestershire 168, Yorkshire 135-5|
|Yorks 3pts, Worcs 1pt|
Tim Bresnan staked his claim for a place in England's Test squad as 15 wickets fell on day one of Yorkshire against Worcestershire.
Bresnan took 4-64 and Ryan Sidebottom 3-40, as the visitors were dismissed for 168 in 54 overs.
Gareth Andrew top-scored with 40, while six players were dismissed for single-figure scores.
Yorkshire stumbled from 107-2 to 135-5 at stumps, trailing by 33 runs, with Andrew Gale unbeaten on 68.
Wicketkeeper-batsman Jonny Bairstow, son of former Yorkshire captain David, received his county cap before play began and he was soon celebrating a catch behind, one of two he took in Worcestershire's innings.
After Sidebottom had trapped Matthew Pardow lbw for an 11-ball duck and Bresnan accounted for captain Daryl Mitchell for seven, Bairstow took a catch off Rich Pyrah (2-28) to get rid of Vikram Solanki (18).
Wickets fell at regular intervals and the visitors were 60-6 at lunch, as Sidebottom, Bresnan and Pyrah were assisted by Ajmal Shahzad (1-20).
After Worcestershire's 168 all out, Yorkshire's reply got off to the worst possible start, Joe Root being run out without facing a ball, when Alan Richardson deflected Adam Lyth's drive into the stumps.
The hosts seemed well set as Gale and Anthony McGrath (32) put on 92 for the third wicket but, after the latter fell to Richardson, Bairstow and Pyrah both fell cheaply.