Calvin Johnson Admits to Smoking Weed After Every NFL Game<br /> The former NFL star said smoking weed <br />was necessary to cope with pain.<br /> Johnson also admitted that the NFL <br />had an opioid problem in a recent <br />interview with 'Sports Illustrated.' <br /> Calvin Johnson, via 'Sports Illustrated' Calvin Johnson, via 'Sports Illustrated' The former wide receiver estimated that <br />he suffered "at least nine concussions" <br />during his football career.<br /> Johnson had multiple injuries throughout <br />his career, including lower-back issues <br />and ankle and knee injuries.<br /> Johnson unexpectedly retired from the NFL in 2016 after a nine-year career with the Detroit Lions.
