They are working out running backs to help fill the void of McCaffrey’s absence.
Smith, 26, played three seasons with the Falcons. The Falcons cut him in April, and the Cardinals and then Vikings waived him in August. He has 230 touches for 1,003 yards and six touchdowns in 35 games.
Hilliard, 26, was cut by the Texans on Aug. 19. He has played games for Houston and Cleveland and has 44 touches for 296 yards and two touchdowns in 32 games.
Emmons, 24, was cut by the Raiders out of training camp. He has never appeared in a regular-season NFL game but had 25 touches for 100 yards and a touchdown.