Prior to the 1899 season, Dahlen was traded by Chicago, and ended up in Brooklyn after another deal. His new team won the NL title in each of his first two seasons, and although his batting average had dropped from that of earlier years, he compensated by continuing to accumulate numerous walks and stolen bases and by playing outstanding defense. In 1902, he finished fourth in the NL with 74 RBI. In he set an NL record for fielding percentage with a .948 average, breaking George Wright's 1878 mark of .947; Tommy Corcoran broke his record in with a .952 average.
