STAT-ERA-AUG -- All players in database
Regular season
| Primary |
| Name | Name | ERA |
| Albert Williams | Moondogs | 2.24 |
| Rick Sutcliffe | Serranos | 2.30 |
| Larry Gura* | Rifles | 2.42 |
| Fernando Valenzuela* | Rifles | 2.44 |
| Jerry Ujdur | Missions | 2.49 |
| Dave Righetti* | Grays | 2.70 |
| Dan Petry | 5-0's | 2.70 |
| Steve Rogers | Corsairs | 2.72 |
| Joe Niekro | Legends | 2.72 |
| Phil Niekro | Legends | 2.77 |
| Tommy John* | Rockets | 2.82 |
| Geoff Zahn* | Stars | 2.82 |
| Jerry Koosman* | Vaqueros | 2.87 |
| Jim Beattie | Canaries | 2.88 |
| Brian Kingman | Missions | 2.90 |
| Len Barker | Mud Hens | 2.96 |
| Charlie Hough | 5-0's | 3.01 |
| Mike Witt | Lemmings | 3.04 |
| Mike Flanagan* | Gnomes | 3.05 |
| Milt Wilcox | Vaqueros | 3.05 |
| Mike Norris | Missions | 3.08 |
| Bill Gullickson | Lemmings | 3.08 |
| Craig Swan | Vaqueros | 3.09 |
| Dave Stieb | Snow Bears | 3.09 |
| Mike Caldwell* | Barons | 3.10 |
| Moose Haas | Missions | 3.11 |
| Charlie Lea | Moondogs | 3.12 |
| Dave LaPoint* | Legends | 3.21 |
| Bruce Berenyi | 5-0's | 3.22 |
| Lamarr Hoyt | Vaqueros | 3.22 |
| Joaquin Andujar | Gnomes | 3.22 |
| Jim Palmer | Hired Guns | 3.25 |
| Luis Leal | Canaries | 3.26 |
| Ron Guidry* | Moondogs | 3.31 |
| Mario Soto | Vaqueros | 3.32 |
| Mike LaCoss | Mud Hens | 3.36 |
| Steve Carlton* | Hired Guns | 3.36 |
| Manny Sarmiento | Rockets | 3.44 |
| John Candelaria* | Missions | 3.45 |
| Britt Burns* | Firebugs | 3.46 |
| Dennis Martinez | Stars | 3.49 |
| Jack Morris | Grays | 3.52 |
| Dennis Lamp | 5-0's | 3.53 |
| Tim Lollar* | 5-0's | 3.56 |
| Bob Welch | Legends | 3.63 |
| Don Sutton | Moondogs | 3.63 |
| Jim Clancy | Metropolitans | 3.65 |
| Charlie Puleo | Rockets | 3.65 |
| Rick Langford | Magpies | 3.67 |
| Rick Rhoden | Rockets | 3.69 |
| Shane Rawley* | Grays | 3.74 |
| Pat Underwood* | Zoo Crew | 3.75 |
| Frank Pastore | Snow Bears | 3.75 |
| Jerry Reuss* | Serranos | 3.77 |
| John Tudor* | Gnomes | 3.77 |
| Scott McGregor* | Corsairs | 3.79 |
| Gene Nelson | Grays | 3.80 |
| Steve Renko | Hired Guns | 3.80 |
| David Palmer | Metropolitans | 3.82 |
| Chris Welsh* | Plainsmen | 3.84 |
| Bob Shirley* | Mud Hens | 3.88 |
| Bob Forsch | Lemmings | 3.88 |
| Bill Laskey | Barons | 3.88 |
| Pete Vuckovich | Snow Bears | 3.91 |
| Paul Splittorff* | Legends | 3.93 |
| Jim Gott | Zoo Crew | 3.95 |
| Doc Medich | Plainsmen | 3.99 |
| Bob Knepper* | Corsairs | 4.02 |
| Mike Moore | Magpies | 4.04 |
| John Butcher | Stars | 4.08 |
| Allen Ripley | Zoo Crew | 4.12 |
| Ken Forsch | Stars | 4.13 |
| John Stuper | Barons | 4.14 |
| Steve Mura | Firebugs | 4.16 |
| Vern Ruhle | Corsairs | 4.17 |
| Bob McClure* | Nukes | 4.17 |
| Dick Ruthven | Snow Bears | 4.18 |
| Dickie Noles | Gnomes | 4.18 |
| Bobby Castillo | Firebugs | 4.21 |
| Rick Honeycutt* | Canaries | 4.25 |
| Larry Christenson | Firebugs | 4.27 |
| Chuck Rainey | Canaries | 4.28 |
| Mike Krukow | Zoo Crew | 4.28 |
| Frank Tanana* | Lemmings | 4.31 |
| Floyd Bannister* | Metropolitans | 4.42 |
| John Denny | Rockets | 4.43 |
| Rick Mahler | Gnomes | 4.50 |
| Nolan Ryan | Rifles | 4.53 |
| Brad Havens* | Rifles | 4.54 |
| Dave Stewart | Hired Guns | 4.56 |
| Burt Hooton | Plainsmen | 4.61 |
| Scott Sanderson | Moondogs | 4.68 |
| Vida Blue* | Rockets | 4.68 |
| Ferguson Jenkins | Mud Hens | 4.72 |
| Matt Keough | Canaries | 4.72 |
| Dennis Eckersley | Lemmings | 4.83 |
| Frank Viola* | Plainsmen | 4.95 |
| Don Robinson | Metropolitans | 4.97 |
| Rich Dotson | Magpies | 5.04 |
| Rich Gale | Plainsmen | 5.06 |
| Mike Morgan | Zoo Crew | 5.23 |
| Bob Walk | Serranos | 5.33 |
| Gaylord Perry | Barons | 5.35 |
| Ray Burris | Nukes | 5.41 |
| Randy Jones* | Grays | 5.42 |
| Marty Bystrom | Nukes | 5.46 |
| Randy Martz | Plainsmen | 5.54 |
| Steve McCatty | Barons | 5.63 |
| Pete Falcone* | Mud Hens | 5.65 |
| Mike Torrez | Serranos | 5.67 |
| Atlee Hammaker* | Zoo Crew | 6.05 |
| Ken Dayley* | Nukes | 6.17 |
| Randy Lerch* | Nukes | 6.17 |
| Mike Scott | Stars | 6.26 |
| Dennis Leonard | Magpies | 6.57 |
| Pete Redfern | Nukes | 6.87 |
| Bruce Hurst* | Stars | 7.05 |