FRISCO, Texas -- The Dallas Cowboys have signed running back Hunter Luepke to a two-year extension worth up to $7.5 million, a source told ESPN.

The deal, according to the source, includes a little more than $5 million guaranteed.

Luepke is the third Cowboy to sign an extension since the start of training camp, joining tight end Jake Ferguson (four years, $52 million) and cornerback DaRon Bland (four years, $92 million) -- and he might not be the last.

The Cowboys also are in discussions with Pro Bowl left guard Tyler Smith regarding an extension that could make him the highest paid interior offensive lineman. Smith is under contract through next season, with the Cowboys picking up his $21.3 million fifth-year option as a former first-round pick.

Asked Tuesday about the talks

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