The vote closes at midnight on Saturday so don't miss the chance to watch all eight nominees and cast your vote.
The winner will be announced at the GUINNESS PRO12 award evening in Dublin on Sunday May 17, alongside a number of other honours.
Players' Player of the Year - won by Ospreys fly-half Dan Biggar last year - will be announced, as well as Young Player of the Year, an award currently held by Glasgow Warriors lock Jonny Gray.
Warriors boss Gregor Townsend will be hoping to regain the Coach of the Season accolade he won in 2013, which was handed to former Munster head coach Rob Penney 12 months ago.
The Rhino Golden Boot award is too close to call at this stage with Biggar and Leinster's Ian Madigan, who won it two years ago, currently leading the way.
The Collision King and Fair Play winners will also be announced while the GUINNESS PRO12 will hand out the Chairman's Award to someone for their career-long contribution to the competition.
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