In December 1912, the team re-formed as the Durham Bulls in the North Carolina State League. Their first game was on April 24, 1913 at Hanes Field on the Trinity College campus (now the East Campus of Duke University). They defeated the Raleigh Capitals 7-4. On May 30, 1917, however, the North Carolina State League folded due to America's joining of the Allied Powers during World War I. The Bulls were declared league champions, even though the season was shortened to only 36 games.

The Bulls then joined the Piedmont League, a minor league with clubs scattered around Virginia and North Carolina, on October 31, 1919. Seven years later, in 1926, the team moved to its new home, El Toro Park. The park was dedicated on July 26 by the Commissioner of Baseball Kenesaw Mountain Landis, who put on a show by riding a real bull, the team mascot, onto the playing field.

Six years later, in 1932, the team became affiliated with the National League's Philadelphia Phillies, the first of ten teams that the Bulls have been affiliated with. The next year, the city of Durham purchased El Toro Park, renaming it the Durham Athletic Park after the 1933 season, but the Bulls were unable to operate for the 1934 and 1935 seasons due to the Great Depression. Then, on June 17, 1939, the Durham Athletic Park burned to the ground, hours after the Bulls had defeated Portsmouth 7-3. The groundskeeper, Walter Williams, who slept under the stands, was able to escape. In a remarkable two-week turnaround, the Durham Athletic Park was functioning again by July 2, with the old wooden grandstand replaced by concrete and steel. The stadium also included temporary bleachers and seated 1,000 people. The crowd that day saw the Bulls beat the Charlotte Hornets 11-4.

The stadium was completed in April 1940 in time for an exhibition game on April 7 between the Cincinnati Reds and Boston Red Sox, that attracts 5,574 fans. Only 1,587 turned out ten days later for the Bulls' first game of the season. On September 5, 1943, the last-place Bulls played their last Piedmont League game, beating Richmond 15-5. The following year, the Piedmont League became an all-Virginia league, and there was no baseball in Durham in 1944.

In 1945, a second Carolina League formed, and on April 27 the Bulls played their first game in the new league, defeating the Burlington Bees 5-0. Three years later, in September 1948, Tom Wright, a former outfielder with the Bulls, became the first Carolina League player to make the majors when he debuted with the Boston Red Sox. And three years after that, the Bulls made history when their 5-4 loss to the Danville Leafs featured the first black player in Carolina League history, Percy Miller Jr., who played for the Leafs.

Football Hall of Famer Clarence Parker was the Bulls' manager from 1949-52.

Click here to visit the Durham Bulls Website