Manuel Sistrunk (born June 16, 1947 in Montgomery, Alabama) is a former American football defensive lineman who played ten seasons in the National Football League. He played college football for Arkansas AM&N (now known as the University of Arkansas at Pine Bluff) and was drafted in the fifth round of the 1970 NFL Draft.

Can we draw the following conclusion?
An injury ended Manuel Sistrunk's career in the NFL.
It's impossible to say