On August 21, 2010 — Casey Kotchman goes 3 for 4 in a 9 – 5 Mariners loss to the Yankees, but makes his first error in 275 games. The previous major league record for errorless games at first base had been held by Kevin Youkilis.
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Sources:
Baseball Reference August 21
National Pastime August 21
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game