I love pirates. I don't think that's a secret. Stat wise, pirates should be similar to bandits (page 432 in the core book). However you can use the following table to turn a common bandit into a pirate. Instead of scimitar's they have cutlasses. You can roll a d6 and use the table below to make your pirates unique.
1 - Peg Leg - reduce movement to 15'
2 - Hook Hand - the pirate can make a hook attack in addition to his standard sword, using 1d14 as their action dice.
3 - Eye Patch - reduce ranged attack modifier's by 2
4 - Tempest Warrior - can go into a fit of battle rage (as Berserker, page 433 of core rules)
5 - Parrot - gains trained parrot companion (see below)
6- Deep One Blood - gains a swim speed 40' and can breathe underwater
Parrot: Init +0; Atk beak +0 melee (dmg 1d2); AC 12; HD 1d4; MV Fly 30’Act 1d20; SV Fort -2, Ref +2, Will +0; AL N.