Most Famous Role
O'Quinn: Lost
As the miraculously un-handicapped John Locke, O'Quinn rocks an awesome eye scar and messianic beatitude that stands in sharp contrast to his crummy life story pre-plane crash. Also, he throws a pretty mean knife-in-the-back.
Walsh: Nip/Tuck
Originally the more grounded, boring member of a pair of flashy plastic surgeons, Walsh's Sean McNamara has slowly descended to the level of his hedonistic partner Christian Troy, and even faked being a paraplegic for a while.
Winner: O'Quinn

First Regular TV Gig
O'Quinn: The Doctors
O'Quinn played Dr. Jerry Dancy in this daytime soap, which saw a lot of big names go through its doors in its 20 years on the air, including Ellen Burstyn, Alec Baldwin and Kathleen Turner. Unfortunately, he was on it during its waning final years, when ratings bottomed out, so nobody knows this.
Walsh: Kate & Allie
At the age of 24, Walsh played the boyfriend of Allie's daughter, Jennie, which gives him only one degree of separation from Jane Curtin.
Winner: Walsh

Preferred Roles
O'Quinn: Military Men
His superior, authoritative demeanor seems to translate well to military roles, which he's played his whole career, most visibly as a colonel on NCIS, an admiral on JAG and Star Trek, a general on West Wing and Harsh Realm, the assistant director of the FBI on Alias... Hell, he was even the Launch Director in the movie Space Camp. So, basically, O'Quinn has protected most of America at some point.
Walsh: Cops
Something about Walsh's average, everyday look makes him perfect for the cop life. He was a patrolman on the short-lived series Brooklyn South, a detective in Blood Work, and a cop-turned-robber in The Almost Perfect Bank Robbery.
Winner: O'Quinn

After-School Special Experience
O'Quinn: The Hand Me Down Kid
This ABC Afterschool Special starred Tracey Gold as a girl who borrows her sister's bike when she gets tired of hand-me downs, only to have it get stolen. O'Quinn plays her dad.
Walsh: Soldier Boys
In this CBS Schoolbreak Special, Walsh plays a teenager who engages in fantasy war games with his friends, until it spills over into real life. The detective investigating the crime was played by James Earl Jones.
Winner: Walsh

Film Debut
O'Quinn: Heaven's Gate
O'Quinn played an army captain (see?) in this saga of cattle barons vs. poor settlers, one of the costliest flops in movie history.
Walsh: Loverboy
Walsh played a jerk trying to steal Patrick Dempsey's girl in this movie about a pizza delivery boy and part-time gigolo.
Winner: Walsh

Historical Roles Played
O'Quinn: Howard Hughes in The Rocketeer
Long before Leonardo DiCaprio played him on screen, O'Quinn brought to life the aviation pioneer in this movie about a stolen prototype jetpack.
Walsh: Jim Shemwell in Lost Holiday: The Jim and Suzanne Shemwell Story
Walsh played one half of an estranged married couple who are trapped in a blizzard while on vacation. Leonardo DiCaprio has not played this role yet.
Winner: O'Quinn

Breakout Movie
O'Quinn: Stepfather
Of the movie, Roger Ebert wrote: "What often happens... is that in an otherwise flawed film there are a couple of things that are wonderful. The Stepfather has one wonderful element: Terry O'Quinn's performance." O'Quinn would go on to appear in the sequel, but not the third and final chapter.
Walsh: Congo
As a scientist who taught a gorilla how to talk through a sign language-interpreting voice box, Walsh faced off with killer, Bruce Campbell-hating gorillas in the heart of Africa. Luckily, Ernie Hudson, Tim Curry and Mr. Eko were there to help.
Winner: O'Quinn

Rutger Hauer Connection
O'Quinn: Blind Fury
In this modernized Zatoichi movie, Rutger Hauer played a blind soldier, taught by Vietnamese villagers to use a samurai sword, who protects a friend's son when his mother is killed. O'Quinn played the friend who was mixed up with a bad crowd.
Walsh: Arctic Blue
Playing an amateur marshal and environmentalist in Alaska, Walsh must bring a murderous fur trapper (Hauer) in to the authorities and fend off the killer's fur-trapper friends, as well.
Winner: O'Quinn

WINNER: It's Terry O'Quinn by a nose!

Do you think Walsh can fill O'Quinn's shoes? Let us know below.