Michael J. Hagan '85 Arena (previously known as the Alumni Memorial Fieldhouse) is a 3,800-seat multi-purpose arena located on the campus of Saint Joseph's University in Philadelphia, Pennsylvania. The arena is the home to the Saint Joseph's Hawks men's and women's basketball teams, and formerly was the home court for the Philadelphia Freedoms of World TeamTennis (WTT).

Originally built in 1949 as Alumni Memorial Fieldhouse, the arena underwent a $25 million renovation in 2009.

Alumni Memorial Fieldhouse was a 3,200-seat multi-purpose arena in Philadelphia, Pennsylvania. The arena, home to the Saint Joseph's University Hawks basketball opened in 1949 and was inaugurated on November 26 with a loss to the University of Rhode Island. The first women's varsity home game was a loss to Immaculata University on January 17, 1974. The building was dedicated to all college soldier-heroes on its dedication day, Veterans Day 1949.

In addition to serving as an arena for the basketball teams, Alumni Memorial Fieldhouse also contains locker rooms for students, faculty, and other varsity teams, an additional recreation room, squash courts, a swimming pool, and a weight room.

On October 26, 1967, the Reverend Dr. Martin Luther King Jr. spoke to 3,400 people in the Fieldhouse. Today, a bronze plaque in the lobby recognizes his visit.

The Hawks won 34 consecutive games in Alumni Memorial Fieldhouse from the late 1950s through the early 1960s. In the mid-1970s and '90s, the Fieldhouse served as the practice home for the Philadelphia 76ers. There were over 125 sellouts over the last 15 years the Fieldhouse was open.

The final game at the Fieldhouse was a win over #8 ranked Xavier University on March 5, 2008. The sell-out crowd included Hawk legends Jameer Nelson and Jack Ramsay.

During the 2007 season, it was announced that the Fieldhouse would be closed and transformed with a $25 million renovation project to provide a 21st-century facility for the quickly growing campus.