ASPE did not provide such a listing, so I attempted to make one myself. I checked each pelotari listed as active on the ASPE roster and did an ASPE database lookup for results from October 1, 2015 until May 31, 2016. I'm not sure how valid this is (several active pelotaris were not in the database). I will list them by most wins.
Mtz. de Irujo 20-5
Mendizabal III 18-10
Merino II 8-9
Retegi BI 4-2
There was no information in the database for Irribarria. His pelotari page had his record since his debut March 22, 2015 at 28-37. Other players listed on the roster but not in the database: