Goblin attack Wrex: (1d20+5)[23]
Damage: (1d4)[1]
If he hits, Wrex Fort: (1d20+8)[16]

Worg attack Wrex: (1d20+7)[12]
Damage: (1d6+4)[5]

Trip attempt: (1d20+3)[19] vs (1d20+10)[25] (I think, may be +9)