Wigginton to the Rockies

Ty Wigginton has been acquired by the Rockies. Although he is a solid back-up, I don't understand how he fits in with Colorado. The Rockies have Todd Helton at first as well as Jose Lopez as their First, Second, or Third baseman. Also, the Rockies have Clint Barmes and Ian Stewart.
Don't get me wrong, Ty is a solid player, but the only way for this to pay off is if the Rockies trade one of their infielders.