Jeffrey S. Kubenka (born August 24, 1974) was an American Major League Baseball left-handed pitcher. He is an alumnus of St. Mary's University, Texas.
Drafted by the Los Angeles Dodgers in the 38th round of the 1996 MLB amateur draft, Kubenka would make his Major League Baseball debut with the Los Angeles Dodgers on September 6, 1998, and play in his final game on August 8, 1999.
A single in his only at-bat left Kubenka with a rare MLB career batting average of 1.000.