Allosaurus

Large beast, unaligned
Armor Class 13 (natural armor)
Hit Points 51 (6d10 + 18)
Speed 60 ft.
STR
19 (+4)
DEX
13 (+1)
CON
17 (+3)
INT
2 (-4)
WIS
12 (+1)
CHA
5 (-3)
Skills Perception +5
Senses passive Perception 15
Languages -
Challenge 2 (450 XP)

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.

ACTIONS

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.

The allosaurus is a predatory dinosaur of great size, strength, and speed. It can run down almost any prey over open ground, pouncing to pull creatures down with its wicked claws.
Monster Manual (SRD) D&D 5 › Monsters