Three free agents, including two with local connections, have been added to the 76ers' roster for today's opening of training camp.

Former college standouts Jeff Myers of Drexel, a 6-foot-2 guard, and Lamont Barnes of Temple, a 6-10 forward, were signed to free-agent contracts yesterday, as was 7-2 center Robb Dryden of Georgia. With their additions, the Sixers' training-camp roster numbers 19.

The three new signees reported to camp at the Philadelphia College of Osteopathic Medicine yesterday, along with other players with three or fewer years of NBA experience. The group will take part in its first practice this morning under Randy Ayers, the Sixers' rookie head coach.

This afternoon, the veterans will report. The first full-squad workout will take place tomorrow morning, with Ayers beginning a series of two-a-day practices.

Among the 10 players with three or fewer years of experience are 6-10 center/forward Marc Jackson, the former Temple star who was acquired from Minnesota in July in a four-team deal, and two players who missed last season with knee injuries - 6-11 center Samuel Dalembert and 6-7 forward Sam Clancy. Also among them are the Sixers' two second-round picks in this year's NBA draft - 6-4 guard Willie Green and 6-7 forward Kyle Korver.