In 2009 Joe Mauer led the American League in batting with a .365 average
Paul O'neill
In 2007 Alex Rodriguez led the American League in home runs with 54
Jacoby Ellsbury led the American League in stolen bases in 2009 with 70.
George Brett had 20 triples that year to lead the AL.
in 1939 Joe DiMaggio led the American league in batting with a .381 average.
In 2009 Prince Fielder led the National Legue in RBIs with 141, and Mark Teixeira led the American League with 122.
Napolean Lajoie of the Philadelphia Athletics led the American League in home runs in 1901 with 14.
Socks Seybold of the Philadelphia Athletics led the American League in home runs in 1902 with 16.
Mark Teixeira of th New York Yankees led the American League in RBI's in 2009 with 122.
Carlos Pena of the Tampa Bay Rays led the American League in home runs in 2009 with 39.
"Dauntless" Dave Danforth of the Chicago White Sox led the American League with 9 saves in 1917. He also led the league in games that year with 50 and games finished with 26. Saves weren't official baseball statistics until the 1970-'s or so. Otherwise, nobody led in saves in the 1910s. Danforth is the correct answer.
Harry Davis of the Philadelphia Athletics led the American League in home runs in 1907 with a total of 9. Ty Cobb, Danny Hoffman, and Socks Seybold tied for 2nd that year with 5 each.