Based on my search, there's only one player in NBA history named Alex Scales:

Alexander Jerome Scales:

Played for the San Antonio Spurs during the 2005 season (brief stint).

Undrafted in the 2000 NBA Draft.

Interesting fact: Alex Scales persevered in professional basketball after the NBA. He played in various international leagues like Turkey, Ukraine, and even continued his career well into his 40s according to local news reports [Racine's Alex Scales still playing pro at 44 years old].