The Tigers (2-3) played solid defense in the first quarter, but the Bruins built a 24-10 halftime lead once their fast break kicked into gear.
Nick Wohlbold led Rock Bridge with 16 points, and Reece Leitao added 8. Zach Morrison had 9 points for the Tigers.
Rock Bridge win the B game, 41-13. Chaz Satnan had 4 points for the Tigers.