Sawyer was a vamp.
Josh Holloway of "Lost" appeared in the first episode of AtS as "Good-looking Guy/Vampire". We see him in the bar in the very first scene, and then outside Angel brawls with him (and other vamps) and ultimately stakes him on top of a car. One damsel, saved.
I'm goofy for trivia like this so I just had to post -- Mods, please delete if this is deemed too tenuous!