Asked to comment Monday, Sember declined, saying he preferred to comment later in the week.
Sember has just completed is fourth season as soccer coach at Haverford. This year the team's record was 3-6 in the Central League and 7-10 overall.
Kathryn Cox, president of the Havertown Soccer Association, said during a lengthy statement, "Our team is not taken seriously by other Central League coaches because they know the caliber of coaching that exists here. It's kick and run. He doesn't teach skill at all."
"Why, under (former coach) Ted Keyser, was Haverford a force to be reckoned with, but under Bill Sember we are nothing?" she said. "Why, when the boys play seventh, eighth and ninth grade soccer, they are winners and at the varsity level they are losers?"
At the end of the comments, Horowitz responded: "We heard you, and we're going to ask the administration to investigate, and we will take whatever action is necessary after the investigation."
High school principal Mel Drukin met earlier with Cox and a parent. Drukin said Friday the complaints were being investigated.
David Plowright, a parent who regularly attends board meetings but who does not have a child playing soccer at the high school, told the board during the session that he thought the discussion was out of line at a public board meeting and termed it "an absolute, absolute disgrace."
At the meeting, Anthony DiCicco, whose son Tony plays on the varsity team, described how Sember failed to respond when Tony DiCicco ran into a goal post and broke his leg during a soccer game earlier this fall.
"Bill Sember never showed any concern or questioned his status," Anthony DiCicco said. "He left the field before Tony was put into an ambulance. Bill never called him to see how he was doing - not that night, not ever."