Lion’s running back Kevin Smith worked with the first team at practice yesterday while Mikel Leshoure took reps with the second team.  Leshoure is expected to play at Tennessee on Sunday after serving his two-game suspension for violating the league's substance-abuse policy.  Cornerbacks Bill Bentley and Chris Houston practiced after missing Week Two with various injuries. Bentley and Houston are listed as questionable against the Titans. Week 3 of the NFL season begins tonight as the defending Super Bowl champion New York Giants head into Carolina to face off with Cam Newton and the Panthers.