He spent his first year coaching at the collegiate level at Loyola College in Maryland, taking the Greyhounds to the team's first modern-day NCAA Tournament appearance.

[1] He played basketball and rugby union at the United States Merchant Marine Academy where he earned a degree in nautical science in 1972.

[6] Prosser earned his master's degree in secondary education from West Virginia University while he taught at Wheeling Central.

Besides replacing Tom Schneider, who had resigned amid a then-school-worst 2–25 season, Prosser inherited a program that had completed its sixth straight losing campaign.

[8] In his only season at Loyola, the Greyhounds finished with a 17–13 overall record and won the Metro Atlantic Athletic Conference Championship to earn its first-ever NCAA Division I tournament berth.

He returned to Xavier precisely one year later, on April 1, 1994, to succeed Gillen, who had accepted a similar position at Providence College two days prior.

[3] Prosser is credited for sparking participation in the Wake Forest student Screamin' Demons and increasing attendance with game-time antics, like having the Demon Deacon mascot enter Lawrence Joel on a Harley Davidson and filling the coliseum with Zombie Nation's "Kernkraft 400" at tip-off and when the Deacons would go on a run.

During his last two troubling seasons, Prosser would quote Thomas Paine, Henry David Thoreau, Friedrich Nietzsche, or William Shakespeare to his players to inspire them.

[2][3] In the spring semester before summer exhibition tours, Prosser would require that every member of his team take a one-credit class on the history of the place they would be visiting.

"[15] Prosser stated, in an interview that aired just after his death, that his favorite quote was from Ralph Waldo Emerson: "He was a transcendentalist in America in the 1830s who said 'Our chief want in life is someone who will make us do what we can.'

A staff member found him unresponsive around 12:45 pm; medical personnel performed CPR and used a defibrillator in efforts to revive Prosser.

[7] He was rushed to Wake Forest University Baptist Medical Center, where he was pronounced dead at 1:41 pm[3] from an apparent "sudden massive heart attack".

[7] Prosser then ate dinner with his son Mark, who was also in Florida recruiting, before flying to North Carolina Thursday morning.