On tonight’s Mets broadcast, Gary Cohen mentioned that the Nationals currently feature the National League leader in wins (Max Scherzer, with 12) and the National League leader in losses (Tanner Roark, with 11). He later noted that the last team to have such a distinction at the end of the season was the 1988 Minnesota Twins.
I wondered how many other teams satisfied that criteria, so I went to Baseball Reference and compiled this list of all such teams since 1901. All occurrences are in the National League unless otherwise noted.
| Year | Leader in Wins | W | Leader in Losses | L |
| 2018 | Max Scherzer (WSN) | 12 | Tanner Roark (WSN) | 11 |
| 1988 | Frank Viola* (MIN – AL) | 24 | Bert Blyleven+ (MIN – AL) | 17 |
| 1979 | Phil Niekro+ (ATL) | 21 | Phil Niekro+ (ATL) | 20 |
| 1973 | Wilbur Wood* (CHW – AL) | 24 | Stan Bahnsen (CHW – AL) | 21 |
| 1970 | Bob Gibson+ (STL) | 23 | Steve Carlton+* (STL) | 19 |
| 1968 | Juan Marichal+ (SFG) | 26 | Ray Sadecki* (SFG) | 18 |
| 1958 | Bob Friend (PIT) | 22 | Ron Kline (PIT) | 16 |
| 1954 | Robin Roberts+ (PHI) | 23 | Murry Dickson (PHI) | 20 |
| 1951 | Bob Feller+ (CLE – AL) | 22 | Bob Lemon+ (CLE – AL) | 14 |
| 1930 | Ray Kremer (PIT) | 20 | Larry French* (PIT) | 18 |
| 1925 | Dazzy Vance+ (BRO) | 22 | Burleigh Grimes+ (BRO) | 19 |
| 1922 | Eppa Rixey+* (CIN) | 25 | Dolf Luque (CIN) | 23 |
| Eddie Rommel (PHA – AL) | 27 | Slim Harriss (PHA – AL) | 20 | |
| 1917 | Pete Alexander+ (PHI) | 30 | Eppa Rixey+* (PHI) | 21 |
| 1911 | Pete Alexander+ (PHI) | 28 | Earl Moore (PHI) | 19 |
| 1902 | Jack Chesbro+ (PIT) | 28 | Stan Yerkes (STL) | 21 |
| Cy Young+ (BOS – AL) | 32 | Bill Dinneen (BOS – AL) | 21 |