The injury situation on the Maryland football team continued to deteriorate yesterday. Starting defensive guard Marlin Van Horn was declared out for the season and wide receiver Chris Havener was ruled out indefinitely, also probably for the season.

Van Horn, who damaged left knee ligaments during the second quarter of Maryland's season-opening 24-20 win over Villanova, will be operated on Thursday by team doctor Stanford Lavine.

Havener, who had practiced with both the first and second teams in early preseason drills, had been out with what originally was diagnosed as a charley horse. But further examination by Lavine uncovered hemorrhaging in the thigh and the doctor has ordered Havener to stay off the leg for at least several weeks.

"If you start feeling like you're snakebit you better get out of the coaching business," Coach Jerry Claiborne said. "The guys who come in to replace them will just have to work extra hard. We all have to work extra hard."

With Van Horn lost, both Maryland players picked by conference coaches to make All-ACC on defense are now sidelined. Defensive back Lloyd Burruss broke a leg the second week of practice and will not be back for at least another four weeks. The Terps lost another starter when tailback George Scott failed out of school.

There was some good news for Claiborne yesterday. Starting guard Paul Glamp, who sat out the Villanova game with a sprained ankle, was declared fit and returned to practice.

Wide receiver Gary Ellis, who missed the preseason with mononucleosis, also was given the go-ahead to begin practicing and should be able to play at least some in the ACC opener against Clemson Saturday.

Although Van Horn played part of Saturday's game, he can play again next fall if he applies for a "hardship" ruling from the conference. Generally players who participate in less than 1 1/2 games are granted another year of eligibility.

Claiborne said he looked at the film of Clemson's season-opening win over Furman for the first time yesterday and was impressed with what he saw.

"Furman's a pretty good football team (8-3 a year ago) and they weren't even in the hunt," Claiborne said. "The thing which surprised me most was their (Clemson's) quarterback (Billy Lott). He was playing his first game and he really looked outstanding."

Saturday's game will be televised regionally with kickoff at 3:20 p.m. . . . Clemson Coach Danny Ford is 2-0 since taking over for Charley Pell just before last year's Gator Bowl. . . Mike Corvino will replace Van Horn. . . Terp regulars worked out in shorts, with those who did not play Saturday scrimmaging. . . Twelve of Maryland's 22 front-line players Saturday were making their first college starts.