While tumultuous changes were going on in the American League, it was business as usual in the NL. The Brooklyn Dodgers won the pennant, then lost the World Series to Cleveland. Pete Alexander reasserted himself as the best pitcher in the league. Big things were happening in baseball; Babe Ruth hit 54 home runs this year, and the spitball was banned. But it would be a few years before the NL underwent serious changes.

        Back from the war, and with a new team (the Cubs), it had taken Pete Alexander a year to get back to his top form. As you can see, his top form was quite a bit better than any other pitcher in the league. Pete was 33 this year, and had his last really spectacular season. The game was changing, and he was battling epilepsy and alcoholism. He never came close to throwing 363 innings again, and only once more had an ERA under 3.00, though he remained a highly effective pitcher for the rest of the decade.
        Brooklyn pitcher Burleigh Grimes was the next best pitcher in the league. This was the first of five 20+ win seasons he had in the 1920's. The man had great timing; although the spitball was banned, pitchers who already threw the pitch regularly were allowed to continue doing so. Grimes fit this description, and threw the spitter for another 15 years, winning 270 games in the process.
        I think Wilbur Cooper and Babe Adams were the next best pitchers in the NL. Both pitchers toiled for a Pittsburgh team that had a horrible offense. Thanks to their pitching, the Pirates managed to have a winning record despite their inept hitters. Cooper was in mid-career; this was his first of three consecutive 20+ win seasons. Babe Adams was 38 years old, and was enjoying a career resurrection.
        Hippo Vaughn had his last outstanding season. Hippo was 32 years old, and seemed well on his way to the Hall Of Fame. But next year he was awful, and his career ended. I assume he hurt his arm, though I don't know this for a fact.