Prosecutors in Nevada have decided not to file charges against Giants relief pitcher Sergio Romo, who was cited by police after causing a New Year's Day ruckus at the Las Vegas airport. Romo was briefly detained and then cited for breaking airport rules after police said he got into a loud argument at a security checkpoint in Terminal 1 of McCarran International Airport at 9 a.m. Jan. 1. Romo soon was released and allowed to proceed to his flight. Clark County prosecutors decided not to pursue charges, Tess Driver, a spokeswoman for the district attorney, said Monday. "We simply do not have the manpower or resources to go forward on every case submittal we receive and must weigh the value, provability and seriousness of each case accordingly," she said. Romo apologized for the incident, saying in a statement that he had "brought negative attention to the San Francisco Giants' organization and its fans. I love and respect the Giants, my teammates and our fans and promise to conduct myself in the future in the 'San Francisco Giants Way.' " Romo, 29, has spent his entire five-year major-league career with the Giants. He finished last season as the team's main closer and saved three of the Giants' four wins in their World Series sweep of the Detroit Tigers. Read more: