There's only one Alex Blackwell recorded in NBA history: Robert Alexander Blackwell Jr., who played for a short stint with the Los Angeles Lakers. Here's what we know about him:

College Standout: Though undrafted in 1992, Blackwell was a standout player for Monmouth College (now Monmouth University). He holds the distinction of being the school's first and only player to make it to the NBA [Monmouth University's First and Only Basketball Player to Play in the NBA].

Brief NBA Career: Blackwell debuted for the Lakers in November 1992, but his NBA career lasted just one season. Details about his time there are scarce, but records show the Lakers renounced their free-agent rights to him in July 1993 [Alex Blackwell Player Profile, Los Angeles Lakers - RealGM].

While not much is known about his playing style in the NBA, his achievement of reaching the league from Monmouth College is a noteworthy feat.