Warwickshire County Cricket Club slumped to 180-7 after bowling out Somerset on the second day of their County Championship game at Taunton.
Somerset resumed on 360-5 and promptly lost James Hildreth for 118, bowled by Keith Barker.
Ricky Clarke removed Gregory for a duck and then caught Ronchi who had made 51 before having Thomas caught for four by Ian Bell.
Jeetan Patal took the final wicket of Overton who had made forty and Somerset were all out for 438.
Warwicks then batted and Varun Chopra and Ian Westwood put on 88 before Westwood was bowled by Leach for 34.
Bell added twelve runs before failing to Leach and when he bowled again. he removed Coleman for a duck, Chopra for 54, Ambrose for a duck and Clarke out for zero to leave Warwicks on 105-6.
Keith Barker went for nine, leaving Laurie Evans and Jeetan Patal at the crease and they had moved Warwickshire onto 180-7 at stumps.