Jamieson was a late bloomer. He had been in the majors for four years before Cleveland manager Tris Speaker bamboozled Connie Mack into adding him to an already unbalanced 1919 trade in the Indians' favor. From 1920 to 1931, he owned left field at League Park. Jamieson started as a pitcher, and he took to the mound in five of his ML seasons. By the time he reached Cleveland, he was clearly a superbly athletic outfielder and a swift, hard-hitting leadoff man. He had nine full seasons over .300, including .359 in 1924. In 1923, he had a 23-game hitting streak and led the AL with 222 hits and 644 at-bats. Defensively, he made spectacular diving catches and powerful, accurate throws. In 1928 his 22 outfield assists were tops, and in a 17-day span he started two triple plays. Jamieson was a frequent MVP candidate, though never a winner.