Ismael Villegas Diaz (born August 12, 1976) is a former Major League Baseball pitcher.

[2] Villegas was called up to the Major Leagues in July 2000 after Mike Remlinger suffered an injury and Don Wengert was designated for assignment.

[3] He made his Major League debut on July 3, 2000 at Turner Field in relief of Terry Mulholland.

He twice faced future Hall of Famer Vlad Guerrero, first hitting him with a pitch and then getting him to ground out.

[4] A few days later he would be replaced on the roster by pitcher Scott Kamieniecki and would not pitch in the Major Leagues again.