Kerrigan leaves Aussies in a spin
Lancashire left-arm spinner Simon Kerrigan marked his four-day debut for England Lions by taking 6-59 as Eoin Morgan's team seized control on day three against Australia A at Old Trafford.
Well supported by Kent's James Tredwell, who returned 3-93, Kerrigan ripped through the tourists' middle and lower order to bowl Ed Cowan's team out for 277.
That gave England Lions a first-innings lead of 38, which had been extended by the close to 196 as Joe Root and Jonny Bairstow batted impressively in a 128-run partnership for the second wicket.
The Lions finished the day on 158 for three and will hope to build a substantial advantage before unleashing Kerrigan and Tredwell again on the final afternoon.
At lunch there had been no sign that Kerrigan was about to produce the third-best bowling figures by a Lions bowler since 2007.
Australia A were well placed on 207 for three, having lost Cowan for 99 and Michael Klinger for 66. Both fell to Tredwell's off-spin, caught behind and at bat-pad respectively.
Shortly after the break Kerrigan had 0-35 in 13 overs. He then claimed six wickets for 24 runs in 73 deliveries as the Australian batsmen wilted before his precocious combination of bounce, deviation and flight on a turning pitch.
First to go was Tim Paine, whose edged cut was superbly caught by Bairstow at slip. Tredwell then bagged the last of his three wickets when Joe Burns was bowled for seven playing no stroke, but from then on it was the Kerrigan show.
Bowling from the Pavilion End on his home ground, the 23-year-old had Peter Forrest lbw attempting a sweep and he then removed two Test players with successive deliveries.
Mitchell Johnson was caught at short-leg by Root for a single and Nathan Lyon was lbw on the back foot when completely deceived by a quicker ball. That meant that Australia A had lost four wickets for two runs in 23 balls, while Kerrigan had taken 3-2 in 10 deliveries.
From 231 for eight, Cowan's lower order recovered briefly with Tom Cooper making 26 not out and Jon Holland contributing a useful 17, but Kerrigan was not to be denied and clinically wrapped up the innings.
Holland was stumped by Craig Kieswetter and Jackson Bird caught at slip by Bairstow to end an innings in which Australia A lost their last seven wickets for 63 runs in 24 overs.
The suffering was not over for the tourists. Although makeshift opener Morgan was out for nought when he pulled Bird to Liam Davis, the Yorkshire pair of Root and Bairstow made the Australia A attack wilt in the Manchester heat.
Root hit a high-class 70 before he sliced Holland to Davis at backward point and Bairstow was unbeaten on 73 at the close. Samit Patel, who did not get a bowl in the Australia A innings, was caught at slip off Lyon for 12 - prompting Tredwell to come in as nightwatchman.