As he left arraignment court, McGraw declined to comment to reporters. His attorney, John Riley, said: "We look forward to addressing those charges in court. We're anxious to present a defense in this case, and we'll do so at the appropriate time."
Police said McGraw, who lives with his father in the city's Fairmount section, arrived at the Sex Crimes Unit at 12:30 p.m., made no statement and was taken by a police van to the administration building. His attorney, John Riley, also declined to comment.
"My son Mark is faced with a serious accusation," said Tug McGraw, in a statement. "It is now in the legal system, and I will stand by my son through that process."
McGraw is a sports reporter for WPVI-TV's Action News sports department and had pitched for the 1973 National League champion New York Mets and 1980 World Series champion Phillies.
Capt. Richard Bullick, head of the Sex Crimes Unit, said Mark McGraw met the 20-year-old woman at a dance on Thursday.
Then, they had "a chance meeting" on Saturday night at a party held by a mutual acquaintance at a house in Fairmount, according to Bullick.
McGraw, the woman and another couple, including the woman's dormitory roommate, left the party about 3 a.m. Sunday, police said.
He drove them to a high-rise dormitory complex - called Temple Towers - at 13th Street and Cecil B. Moore Avenue - where the woman signed in McGraw as a visitor, according to investigators. McGraw is not a student at Temple.
The couples went to the woman's apartment, where the two women fell asleep.
The woman told police she was awakened by McGraw raping her. She reported the assault at 10:30 a.m. Sunday.
She was treated at Episcopal Hospital, according to police.
Temple spokesman George Ingram had no comment on Mark McGraw's arrest.
Tug McGraw left the Sex Crimes Unit in a car as Bullick discussed the case.
"Naturally, he is very concerned for his son," the police captain said. ''There is not a lot you can say in a situation like this."