He had some decent peak value. In an eight year period, he had six top 5 finishes in WAR for pitchers, including four 2nd place finishes (and 3 in a row, from 1930-32, trailing Lefty Grove each time).
He also led the AL in WAR for all pitchers and players in 1935 with 11.0. That was a year when Grove, Gehrig, Foxx and Gehringer were all still very good or in their primes. Here is the top 10 from that year
| 1 | Ferrell (BOS) | 11 |
| 2 | Grove (BOS) | 8.8 |
| 3 | Gehrig (NYY) | 8.7 |
| 4 | Foxx (PHA) | 8.3 |
| 5 | Gehringer (DET) | 7.8 |
| 6 | Greenberg (DET) | 7.7 |
| 7 | Harder (CLE) | 7.1 |
| 8 | Appling (CHW) | 6.7 |
| 9 | Myer (WSH) | 6.1 |
| 10 | Vosmik (CLE) | 5.9 |
Since 1920, there have been 33 seasons of 11 or higher in WAR. I count 23 players & pitchers in that group. The only ones not in the Hall besides Ferrell are Barry Bonds, Roger Clemens, Dwight Gooden and Dizzy Trout (whose year was 1944, a war year).
Ferrell was 5th in ERA+ that year (1935) while not being in the top 10 in FIP ERA. What helped his WAR was the IP total and the fact that he had a 141 OPS+ (.347 AVG, .427 OBP and .533 SLG). His career WAR is 61.6 and 12.7 of that comes from offense. His career OPS+ is 100. Very, very good for a pitcher.
Ferrell was 3rd in overall WAR the next year (1936). His career after age 29 did not amount to much (maybe because of injuries or behavioral issues-Click here to read the SABR biography by Mark Smith). Only 216 of his 2,623 IP came after age 29.
He led the AL in IP from 1935-37. In 1935 he had 322.1 and 2nd place Mel Harder had 287.1. Ferrell had 7 top 10 finishes in ERA+ and 3 in FIP ERA.
I counted about 100 Hall of Famers who trail him in career WAR. Here are the pitchers (if it is not all of them, it is close). The + means they are Hall of Famers and the number in parentheses is numbers of years played.
| Early Wynn+ (23) | |
| Stan Coveleski+ (14) | |
| Dazzy Vance+ (16) | |
| Jim Bunning+ (17) | |
| Rube Waddell+ (13) | |
| Joe McGinnity+ (10) | |
| Whitey Ford+ (16) | |
| Mordecai Brown+ (14) | |
| Eppa Rixey+ (21) | |
| Burleigh Grimes+ (19) | |
| Waite Hoyt+ (21) | |
| Chief Bender+ (16) | |
| Sandy Koufax+ (12) | |
| Bob Lemon+ (15) | |
| Hoyt Wilhelm+ (21) | |
| Dizzy Dean+ (12) | |
| Herb Pennock+ (22) | |
| Addie Joss+ (9) | |
| Rich Gossage+ (22) | |
| Jack Chesbro+ (11) | |
| Catfish Hunter+ (15) | |
| Rollie Fingers+ (17) |
Now some notable position players who trail Ferrell in WAR
| Harmon Killebrew+ (22) |
| Yogi Berra+ (19) |
| Hank Greenberg+ (13) |
| Willie Stargell+ (21) |
| Joe Gordon+ (11) |
| George Sisler+ (15) |
| Bill Dickey+ (17) |
| Joe Medwick+ (17) |
| Enos Slaughter+ (19) |
| Bill Terry+ (14) |
| Willie Keeler+ (19) |
| Gabby Hartnett+ (20) |
| Mickey Cochrane+ (13) |
| Kirby Puckett+ (12) |
| Orlando Cepeda+ (17) |
| Tony Lazzeri+ (14) |
| Larry Doby+ (13) |
| Ralph Kiner+ (10) |
| Jim Rice+ (16) |
| Lou Brock+ (19) |