Remember WAR is a counting stat, the older guys threw many more innings and were able to accumulate more WAR. Here are the leaders in WAR/1000 batters faced, min 54.5 WAR (Sandy Koufax) 6.66 Pedro Martinez 6.34 Roger Clemens 5.92 Roy Halladay 5.91 Lefty Grove 5.74 Sandy Koufax 5.46 Walter Johnson 5.44 Tom Seaver 5.38 Randy Johnson 5.33 Bob Gibson 5.25 Bret Saberhagen 5.25 Curt Schilling 5.13 Mike Mussina 5.02 Pete Alexander 4.97 Cy Young 4.80 Ed Walsh 4.79 Kevin Brown 4.74 Greg Maddux 4.72 Christy Mathewson 4.72 David Cone 4.66 Don Drysdale 4.56 Dazzy Vance 4.52 Mordecai Brown 4.50 Juan Marichal 4.48 John Smoltz 4.45 Rick Reuschel 4.45 Hal Newhouser 4.42 Fergie Jenkins 4.40 Bert Blyleven 4.39 Gaylord Perry 4.35 Carl Hubbell 4.33 Warren Spahn 4.29 Eddie Plank 4.27 Phil Niekro 4.24 Whitey Ford 4.22 Robin Roberts 4.18 Luis Tiant 4.09 Larry Jackson 4.08 Bob Feller 4.03 Chuck Finley 3.94 Jim Palmer 3.89 Steve Carlton 3.85 Jim Bunning 3.76 Nolan Ryan 3.68 Jerry Koosman 3.60 Tom Glavine 3.52 Vic Willis 3.30 Ted Lyons 3.27 Don Sutton 3.23 Red Faber 3.12 Frank Tanana 3.00 Tommy John WAR isn't the only thing to consider, I would list my top 5 as Pedro Martinez Walter Johnson Lefty Grove Bob Gibson Roger Clemens