It was a day of upsets at the Maryland State Amateur Golf Championship at Argyle yesterday.

Beaten were defending champion Jerry McFerren; Henri deLozier, who has played in two Masters; comedalists Paul Celano and Howard Swartz, and Brian Willard of the host club, one of the top amateurs in the area.

Willard had an unusual defeat, recorded as losing on the 19th hole to Jimmy Glass of Turf Valley. Willard was 1 up going into the last hole when a chronic back problem made it difficult for him to swing. He virtually conceded the hole to Glass, squaring the match, and was in too much pain to continue. Glass was awarded a 1-up victory on the 19th, gaining the quarterfinals.

McFerren lost to Mike McCarthy, 1 up, and deLozier, far off his game, was victimized by Ed Offterdinger of Bethesda. Both upset winners lost in the second round.

The round of eight includes James Kelman, Gary Mankulish, Glass, Mike Toomey, Jim DeBusk, Ben Brundred III, Jack Skilling and Robert Lang.

Mankulish, former Maryland Amateur and Middle Atlantic Amateur champion, who is having a great year, beat Chris Hurst of Suburban, 5 and 3, in the morning but had a tougher time with Jim Fitzgerald in the afternoon. Fitzgeral was 2 up after 13 then Mankulish birdied the 14th, parred 16 to even the match and birdied 17 to go ahead and won it by halving 18.

Skilling, at 16 the youngest player in the tournament, breezed through his afternoon match with Norm Vacovsky of Sparrows Point. Skilling was 5 up at the turn, won the 10th and 11th and closed out the match on the 13th. He was eight under par in the morning against Joe DeFato of Bethesda, finally winning the match on the 19th with a par.

Brundred was three under par in the morning in disposing of Chuck Ebner, 4 and 3. He was 4 up at the turn in his afternoon match against Dr. Terry Scerba and finished his opponent off on the 15th with a par. Brundred was two under in the afternoon with former University of Maryland player Dave Howard of Pinecrest.