5 Mastiffs chased the lure into the AKC Fast CAT rankings in 2017, and Deez Guardian Of The Gate Druzilla blazed to the front at 20.87 mph — 100 yards in a flat 9.80 seconds, edging Bobaras Sweet Little Mystery by a whisker (0.04 mph). The top 5 averaged 16.9 mph, up from 17.60 mph the year before — proof of how deep the Mastiff talent really runs.
See full AKC Fast CAT speed rankings — by breed, by year, and all-time — on Dash-Hound.