The Baltimore Orioles traded shortstop Kiko Garcia to the Houston Astros for outfielder Chris Bourjos and an unspecified amount of cash last night on the final day for interleague trading.

Garcia, 27, was with the Baltimore organization 10 years, playing shortstop and second base in his four full seasons with the Birds. He batted .199 in 111 games last year but suffered from back problems.

He hit .247 in 126 games 1979 and starred in the World Series against the Pittsburgh Pirates.

The 26-year-old Bourjos, who hit .227 in 13 games last year with San Francisco, was immediately assigned to the Orioles' Rochester farm team.

In a deal separate from the Jason Thompson trade, which was stayed by Commissioner Bowie Kuhn, the California Angels acquired Ken Forsch from the Houston Astros in exchange for infielder Dickie Thon.

Forsch, 34, asked to be traded after the 1980 season, when he had a 12-13 record and a 3.20 ERA in helping the Astros win the National League West title.

Thon, 22, hit .255 for the Angels in a utility role last year.

Meanwhile, the Detroit Tigers assigned pitcher Mark (The Bird) Fidrych to their Evansville affiliate in the American Association subject to 24-hour recall. It was the third and final option used on the colorful, 26-year-old right-hander, who was 19-9 in 1976.