Playing a league match tonight I had used none of my 4 RR and scored my 2nd TD late in the 2nd half. On lining up for the kickoff I noticed I now had 5 rerolls - this was before any kickoff events and I had no inducements. The kickoff table result was cheering fans and we both got rerolls, and the game showed me as having 6 rerolls now!
I've not seen this before with this team, and all that has changed since last match is I took Leader on my thrower when he levelled. This is a link to the zip file containing screenshots of 5 and 6 rerolls (dicelog shown) as well as the gamelog file and the replay.