By
SABC Sport
27th September 2025
Marcell Coetzee and Cheswill Jooste also claimed two five-pointers apiece as the home team scored nine tries in the contest to start a new era under head coach Johan Ackermann.
It was Ospreys who made the early running in the game when Keelan Giles and Keiran Williams dotted down to give the visitors a 12-0 lead.
The hosts hit back and levelled matters on the scoreboard as Coetzee powered over for a double while Keagan Johannes slotted one conversion.
The Welsh side though refused to lie down and Williams grabbed his second try of the game as his side took a halftime lead.
The Bulls gained momentum after the interval and hooker Grobbelaar completed his hat-trick to help his team run away from the visitors.
The Ospreys briefly rallied through No 8 Morgan Morse while Jack Walsh also crossed as the Welsh outfit took a bonus-point from the game.
Replacement prop Juann Els though put the game beyond doubt while Jooste also touched down for his second try as the Bulls finished strong.