The Philadelphia Athletics won the pennant, but they were a big hitting team, and had a below average pitching staff. The next best teams in the league were Boston and Washington, and they had a pair of pitchers who had remarkable seasons.

         Walter Johnson had another outstanding season for the Washington Senators, who supported him with a decent team. Johnson led the league in a bunch of categories, and was third in ERA. He was by far the hardest worker in the AL, throwing 69 more innings than Harry Coveleski for the league lead.
         Dutch Leonard also had a remarkable season, posting the lowest single season ERA of the 20th century. Baseball history has two Dutch Leonards; the other guy was a knuckleball pitcher in the 30's and 40's. This Dutch Leonard is famous for his 0.96 ERA, and infamous for being the biggest, um, snitch in baseball history.
         In baseball's most scandalous era, an alarming number of players were banned from the sport for intentionally losing baseball games to help gamblers make money. Dutch Leonard accused many different players of throwing games. This may not seem a bad thing, except that Leonard had a tendency to accuse innocent players. The worst case was Tris Speaker, whom Leonard accused without providing a shred of evidence. Leonard also pitched for ten more years, and had some good seasons, though he was never again dominant.
         Chief Bender was the Athletics' best pitcher. He didn't pitch a lot, but had a great won-loss record, a good ERA, and a third of his starts were shutouts. I'll give Chief the edge over Carl Weilman, who had the best year of a short career.