Only 3 (Muzza twice) according to this site: http://cricketarchive.com (An awesome site, but be prepared to lose the next 3 hours of your life, or at least till Albion kick off....)
344* MW Goodwin v Somerset Taunton 2009
335* MW Goodwin v Leicestershire Hove 2003
333 KS Duleepsinhji v...
He would be the 6th different batsman out of the 8 times it has happened, Hussey did it 3 times.
331* MEK Hussey v Somerset, 329* v Essex, 310* v Gloucestershire
322* MB Loye v Glamorgan
319 CJL Rogers v Gloucestershire
303* DJG Sales v Essex
300 R Subba Row v Surrey
282* BM Duckett v...