Roberto Alas Jalnaiz (born November 10, 1966) [3] is a retired amateur boxer from the Philippines who is best known for winning his country's only gold medal at the 1990 Asian Games.

[4] He defeated Thailand’s Chatree Suwanyod, Nepal’s Suresh Malla Thakuri, Indonesian Franky Mamuaya and South Korean Hwang Kyung-sup en route to winning a gold medal in the bantamweight class.

[5][6] He stopped Agustin Castillo of the Dominican Republic in his opening bout in Barcelona before posting another abbreviated victory over Frenchman Philippe Wartelle to reach the quarterfinals of the bantamweight division.

[4][5] Jalnaiz was leading Joel Casamayor halfway through the first round of their quarterfinal bout when the fancied Cuban landed a solid left that knocked him out and abruptly put an end to their duel.

[7] Jalnaiz remained involved in boxing after settling in California and was often included in Manny Pacquiao’s large entourage whenever the Filipino ring icon has a fight in the United States.