Brad Greenberg (born 1954) is an American basketball coach, most recently head coach at Radford University. He also served as an assistant coach for Virginia Tech, and the NBA's Los Angeles Clippers and New York Knicks. In addition, Greenberg was director of player-personnel for the Portland Trail Blazers and general manager of the Philadelphia 76ers.

Greenberg was named Radford's sixth head men's basketball coach on March 23, 2007, after serving four seasons as an assistant coach to his brother, Seth, at Virginia Tech. He also was an assistant college coach at American University, Saint Joseph's University and South Florida University.

During his stint as general manager, the Philadelphia 76ers drafted scoring sensation Allen Iverson, dubbed by Philly fans as "The Answer," with 1996's first overall pick. In Iverson's third NBA season, the Sixers ended a string of seven consecutive losing seasons and simultaneously started a five-season NBA playoff run.

He resigned his position at Radford University on May 18, 2011, amid NCAA investigations. In February 2012, Radford received two years of probation from the NCAA, but no postseason ban, for major recruiting violations. Greenberg was hit with a five-year show-cause penalty, which effectively bars him from college coaching during that period.

Patrick Sean Calathes (Greek: Πατ Καλάθης, born on December 12, 1985 in Casselberry, Florida, USA) is a Greek American professional basketball player. He is 6'10" in height (2.08 m) and plays the forward position.

Calathes began high school at Lake Howell as a wiry 5'11" (1.80 m) tall point guard, but he would grow to 6'10" (2.08 m) by his senior year. After graduating, he would go on to play for the Saint Joseph's Hawks at Saint Joseph's University in Philadelphia. At St. Joe's he saw limited time as a freshman and played as a key substitute during his sophomore season.

It was not until his junior season, during which he averaged 13.9 points per game and 7.1 rebounds per game, that he began to fully regain the physical and athletic abilities that he possessed before his growth spurt. He increased his per game averages to 17.5 points and 7.5 rebounds in his senior year and teamed up with center Ahmad Nivins to lead the Hawks to the 2008 Atlantic 10 title game and the Hawks' first NCAA Men's Division I Basketball Championship Tournament appearance since 2004. SJU would lose to the University of Oklahoma's men's basketball team, the Oklahoma Sooners, in the opening round.