Bock missed the first 7 rounds of the 2005 season, but returned in round 8 and showed signs that he and All-Australian defender Ben Rutten would become one of the best defensive combinations in the AFL, a promise the duo delivered on in the next few years. Bock has not lost his forward origin, either; he kicked two goals from tight angles in the third quarter against Fremantle in the 2006 Qualifying Final as Adelaide came from behind to win, and replicated the feat late in the Preliminary Final against West Coast, this time unsuccessfully.