Red Ruffing debuted in 1924 for the Red Sox and was a pretty lousy pitcher through 1931, posting a 4.52 ERA (93 ERA+) and a .378 winning percentage. In 1932 with the Yankees, Ruffing went 18-7 with a 3.09 ERA and led the league in strikeouts, starting a kind of second career. He slumped to average in 1933 and 1934, but from 1935 through 1942 (his age 30 through 37 seasons), Ruffing was pitching at a Hall of Fame level for the Yanks, four times winning 20 games and once winning 19. He even posted a 2.98 ERA in 1937 and an improved 2.93 in 1939. Ruffing then lost the next two seasons to military service. When he returned in 1945, he was 40 years old, but he was better than ever, going 7-3 with a 2.89 ERA in 87 1/3 innings. He had a 1.77 ERA and a 5-1 mark across 61 frames the following season. In 1947, however, Ruffing went 3-5 with an ERA over 6.00 for the White Sox in limited action. He was released by the club on September 30.
Despite his success, Ruffing is best known for two other things. Before his MLB career, he suffered the loss of four toes on his left foot when a coal car ran over it. Secondly, he was regarded as one of the greatest hitting pitchers in history, batting a career .269 with 36 home runs.
Additionally, Ruffing had a 7-2 record in the World Series with a 2.63 ERA and 61 strikeouts, winning six rings.
However, Ruffing's career winning percentage is 41 points below the Hall of Fame average, and his adjusted ERA is only 109. To start out a career like Ruffing did and still make the Hall of Fame would take a pretty amazing turnaround. Ruffing did have a fantastic turnaround starting in 1932, but it wasn't strong enough.
My opinion: Red Ruffing is probably not a Hall of Famer.