In a 2007 game against the Wizards, LeBron had exactly 27/7/7 … Until he grabbed a board with 1 sec left up 7 off of a missed layup from Antonio Daniels.
The game was 109-102 with 1.7 seconds left. Of course LeBron had to ruin it, with help from Antonio Daniels. For this reason Lebron still hasn’t had a 27/7/7 game.
Source: https://www.basketball-reference.com/boxscores/pbp/200704250CLE.html