Tony Romo had the best completion percentage by a quarterback in a game with 14+ passing attempts in 2014, at 90.0 percent against the Colts on December 21, 2014.

highest completion percentage by a qb in a regular season or postseason game in the 2014 nfl season with a minimum of 14 attempts
Interpreted as:
highest completion percentage by a qb in a regular season or postseason game in the 2014 NFL season with a minimum of 14 passing attempts

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