Gerald Raymond Ujdur (born March 5, 1957) is a former Major League Baseball pitcher.

He was selected by the Detroit Tigers in the fourth round of the 1978 Major League Baseball Draft, and began his career with the Lakeland Tigers that year, finishing with a 5-2 win-loss record and a 2.39 earned run average (ERA).

[1] Ujdur was called up to the majors on August 17, 1980 to replace injured pitcher Roger Weaver.

In 1981, he pitched in four games for the Tigers, but spent most of the year with Evansville, where he had a 7-10 record and a 4.09 ERA in 25 starts.

That year, he had a 10-10 record and a 3.69 ERA and finished second in the American League in hits per nine innings with 7.58.