There are a lot of parallels to Wilbur Wood and Dennis Eckersley. First of all, they are almost the exact same rating, in my book. Eckersley might edge him out, but it’s close.
Another big parallel between the two of them is the fact that they both basically spent half of their career as a starting pitcher and half of their career as a relief pitcher.
The parallels between the two help some historians argue that if Eckersley is in the Hall of Fame, then Wood should be also. They argue, in short: generally the same career layout, and generally the same career numbers, when adjusted per decade.
Now, Eckersley was a starting pitcher during the first half of his career and he was a relief pitcher during the second half of his career.
Basically, Wood was opposite. He was a relief pitcher during the first half of his career and he was a starting pitcher during the second half of his career. Of course, what Wood did is rare, usually you start first and then spend the twilight of your career in the bullpen. Not Wood, he relieved first, and started as he got older, rare and arguably harder to do.
Wood had an incredibly long 17 season Major League Baseball career and he started pitching in MLB as a teenager during the 1961 season.
He had two or three good pitches he threw, but he was generally a knuckleball pitcher. He usually threw the knuckleball and some historians argue he possessed the best knuckleball in history. Though, his peer relief pitcher from the 1960s, Hoyt Wilhelm, is also argued to have the best knuckleball of all time.