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The Washington Redskins have announced that running back Roy Helu will miss the remainder of the 2012 season. Helu was placed on injured reserve due to a “lower leg” ailment believed to be turf toe.

As previously passed along, Ryan Grant was signed to take his place.

Although Helu showed impressive burst, acceleration, and all-purpose running back tools during his 2011 rookie year, he was dogged by injuries late in the season and could not shake the injury bug in what amounted to a brief second season. Helu was used primarily as a passing-down back behind Alfred Morris in Washington’s first three games.

The Redskins will ride Morris, Evan Royster, and Grant at tailback for the foreseeable future.