J.J. Watt's most memorable hit required six stitches.
In Week 4 of the 2013 season with the Houston Texans, Watt's hit on then-Seattle Seahawks quarterback Russell Wilson left a deep gash on the defensive end's face, his nose and face bloodied as he walked back to the sideline.
That may be the lasting image of Watt's career which the Arizona Cardinals star announced on Tuesday, via Twitter, was coming to an end.