At one point in the season last year; Zetterberg could not even bend down to tie his skates, but grinded through all 82 games and did not lose consistency in production. His worst months were November and January, before the back started getting worse. Production did not dip at all in the second half of the season with worsening back condition.
Zetterberg has more will power than even Yzerman. Retire that number, and induct into HOF.
https://www.google.com/amp/s/octopusthrower.com/2018/08/24/detroit-red-wings-factors-zetterberg/amp/