[2] After high school, Rosan enrolled in Temple University and played for the Owls for three seasons, then graduated in 1935.

[3] Upon completing college, Rosan joined the Philadelphia Sphas at the end of the 1934–35 ABL season.

[2] While with the Bullets, Rosan took over as head coach for the team and replaced Ben Kramer at the start of the 1944–45 season.

The following season, Rosan coached the Bullets towards their 1945–46 ABL championship win.

[4] Outside of the ABL, Rosan played basketball briefly for the Hazleton Mountaineers and Allentown Barons in 1936 and 1938, respectively.