The New England Patriots tried out three free agent running backs today, according to a league source.

The Patriots tried out Allen Ervin, Jehuu Caulcrick and Kestahn Moore.

Ervin has a previous stint with the Detroit Lions.

Caulcrick is a 255-pound fullback who previously played with the New York Jets.

And Moore, who played collegiately at the University of Florida, has had previous stints with the San Diego Chargers and the Denver Broncos.

However, none of the players were immediately signed to a contract.

The Patriots did sign former USC linebacker Thomas Williams to the practice squad.

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