Alexander Hamulack (born November 14, 1976) is an American former professional baseball pitcher.

He was drafted in the 32nd round of the 1995 Major League Baseball draft by the Houston Astros out of Edgewood, Maryland High School, and he pitched within their system from 1996–2003, at which point he left as a minor league free agent to join the Boston Red Sox organization.

He made his big-league debut on September 2, 2005, when the Mets played the Florida Marlins.

On January 4, 2006, Hamulack found himself a part of his fourth organization in four years, as he was dealt from the Mets to the Los Angeles Dodgers along with Jae Weong Seo in exchange for relievers Steve Schmoll and Duaner Sánchez.

Hamulack signed a minor league contract with the Cincinnati Reds on June 1, 2011.