Choi was placed on the Triple-A disabled list with a strained left hamstring, Mark Sanchez of the New York Post reports.
Choi hasn't played since going 3-for-4 with a home run last Saturday. The first baseman has just 54 games of big-league experience, but he was slashing an impressive .353/.438/.529 in the minors before getting hurt and figures to continue providing organizational depth at first when healthy.