Larry Storck defeated defending champion Justin Klein yesterday on the second day of the Maryland State Golf Association's 78th annual men's amateur championship.

Storck, a former winner of the competition, beat Klein, 3 and 2, in the first round of the single elimination match-play tournament at Woodmont Country Club in Rockville.

Storck fell to Stu Strang in yesterday afternoon's second round. Strang defeated Storck, 5 and 3, to advance to today's quarterfinal round.

The semifinals also will be played today, with the 36-hole championship scheduled for Sunday.

Marty West, who has won the amateur nine times, also was eliminated after he lost to Rick Riddle, 3 and 2, in the second round.

Kenny Doerrer, the medalist in Thursday's qualifier, reached the quarterfinals by defeating Dan Riskam, 3 and 2.

Mike Albus, a recent Naval Academy graduate, also advanced by beating Kirk Lombardi, 4 and 3.

First round

Larry Storck def. Justin Klein, 3 and 2; Stu Strang def. Ken Winfield, 3 and 2; Chuck Freedman def. Mark Cusic, 5 and 4; Mike Boyd def. Henry Blue, 5 and 4; Kirk Lombardi def. Rick Sovero, 2 and 1; Mike Albus def. Todd Pratt, 4 and 3; Wes Gribas def. Dave Kaplan, 2 and 1; Clark Topping def. Steve Block, 2 and 1.

Kenny Doerrer def. Matt Sughrue, 4 and 2; Danny Riskam def. Dag Alstad, 4 and 2; Marty West def. Mike Gillis, 1 up (19 holes); Rick Riddle def. Charles Solomon, 1 up (19 holes); Chuck Ingram def. Mike Hudak, 1 up; Mike Mitchell def. Allan Phillips, 2 and 1; Bobby Kaestner def. Joe LeFavor, 3 and 2; Brad Hasting def. Bart Mease, 5 and 4.

Second round

Strang def. Storck, 5 and 3; Freedman def. Boyd, 4 and 3; Albus def. Lombardi, 4 and 3; Topping def. Gribas, 3 and 2; Doerrer def. Riskam, 3 and 2; Riddle def. West, 3 and 2; Ingram def. Mitchell, 1 up (21 holes); Hastings def. Kaestner, 1 up.