Julio Julián Castillo Valdez (June 3, 1956 – July 23, 2022)[1] was a Dominican professional baseball infielder and manager.

[3] In 1981, while with the Triple-A Pawtucket Red Sox, he played in the longest professional baseball game in history, batting 2-for-13 in the 33-inning contest.

On May 6, 1983, Valdez was arrested at Fenway Park by members of the Boston Police Department during a game against the Seattle Mariners.

[4][5] Charged with statutory rape, it was subsequently reported that the minor involved had lied to Valdez about her age.

[2] After his playing career, Valdez managed the Dominican Summer League teams for several MLB franchises, including the Cubs, New York Yankees, and Chicago White Sox.