Dennis Osborn Trophy
The WABUA’s Most Improved Umpire award recognises an umpire whose dedication to umpiring and their own development has seen them make a substantial improvement in their performance. 

• 2020/21 - 
• 2019/20 - 
• 2018/19
• 2017/18
• 2016/17
• 2015/16 - Ben Stone
• 2014/15 - Bob Bond
• 2013/14 - Dan Morgan
• 2012/13 - Mike Penn
• 2011/12 - Ben Stone
• 2010/11 - Terry Ford
• 2009/10 - Chris Rapley
• 2008/09 - Mike Penn
• 2007/08 - Michael Hardie
• 2006/07 - Ryan Harder
• 2005/06 - Chris Rapley
• 2004/05 - Jon Byrne
• 2003/04 - Peter Bowie
• 2002/03 - Ron Mills
• 2001/02 - Brett Robson& Jon Byrne
• 2000/01 - Travis Hatch
• 1999/00 -  Louis Kudlak
• 1998/99 - Hilton Logan
• 1997/98 - Guven Mercankosk
• 1996/97 - John McGarry
• 1995/96 - Ian Robertson
• 1994/95 - Dave Hewett
• 1993/94 - Dennis Ridley
• 1992/93 - David Gripper
• 1991/92 - Neil Lewis