Idk if u get Bill James website King ...but just other day he reported defense began decline at age 25 so u hit that on nose. He wrote a long article this week about What kinds of players sustain and have long careers - it came down to the age they started career and the players speed. He made the point that speed is the 1 skill that is used for both offense and defense, thus allowing the player to use that skill in different ways (I kno that's simple But he always brings to light things that I forget about). Lastly, he discussed pitchers and how many of the great pitchers didn't get too many innings on their arms before age 26. He reported that too many innings before age 26 leads to a leveling off of a pitchers career...whereas if they wait then they have the frame and oth err supports to have greater success. He did not mention,arm speed nor the effects of Tommy John surgery.



