5 biggest missed trade opportunities in Knicks history'What if' are two of the most powerful words in sports9/18/2022, 2:00 PMDavid VertsbergerNBA freelance writerFebruary 19, 2022; Cleveland, OH, USA; NBA great Kareem Abdul-Jabbar (left) and NBA great Julius Erving (right) during the Skills Challenge during the 2022 NBA All-Star Saturday Night at Rocket Mortgage Field House. / Kyle Terada-USA TODAY Sports