First of all, May is listed as a F-C by nba.com: http://www.nba.com/playerfile/sean_may/index.html
Sean had played some C earlier in the season, but I was waiting to see what happened when he came back from his latest injury.
We was clearly playing C in the 1st half tonight, especially with the 2nd unit when both Primo and Okafor were out.
In the 2nd, he was playing along with Okafor. Usually, they would set Okafor on the block and run the pick-and-roll with May, but about 1 out of the 4 times I watched they put May at the 5. I kinda tuned out of the game late, so I'm not 100% sure they continued that pattern.
But between 25% of the time as a C with the "1st team" and 100% of the time at the 5 with the 2nd, I thought it was good enough for a vote.