James suffered a broken nose last week when Oklahoma City's Serge Ibaka hit him in the face while attempting to block a dunk .
GALLERY: NBA players who have worn masks
LeBron finished with an emphatic slam, but fell to the court, where blood began to leak from his nose.
After sitting out the Heat's Sunday game against the Bulls , James wore the mask during practice , and returned to the lineup on Thursday against the New York Knicks.
It's been ten years since LeBron last donned a mask, and all that's changed is his two NBA titles, multiple League MVP award, an Olympic gold medal and a rapidly receding hair line.
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