Armor Class 13 (natural armor)
Hit Points 51 (6d10 + 18)
Speed 60 ft.
Skills Perception +5
Senses passive Perception 15
Languages —
Challenge 2
Pounce. If the allosaurus moves at least 30 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 13 Strength saving throw or be knocked prone. If the target is prone, the allosaurus can make one bite attack against it as a bonus action.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage.
Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.
Monster Manual (2014), p. 79