Career: Marinos (Venezuela-LPB, 1998), Panteras (Venezuela-LPB, 1999-2006), Tanqueros (Venezuela-LNB, 2001-04), Guaiqueries (Venezuela-LPB, 2006).
Gregory Vallenilla is a scorer and is considered one of the best domestic players of both the LPB and LNB. He has played for Panteras de Miranda in the LPB since 1999 but was loaned to Guaiqueries de Margarita during the 2006 season because the team had financial problems.
Vallenilla is hard to stop when he decides to penetrate to the basket because of his athleticism. But he is not a very good long distance shooter. His physical abilities also make him a good rebounder. Despite his good performances in the domestic leagues, he has not been a regular member of the National Team since he made his debut in 2003.