There are also scenarios where he could pinch run for Tellez, slowest guy on the team, and hasn't. Can't remember them all exactly but this game against Boston where we lost by a run is one example. Check out the top of the 9th where an extra run would have been huge. Not an exact duplicate of the circumstances though.
http://www.espn.com/mlb/playbyplay?gameId=401074919&wsVar=us~mlb~gamepackage,desktop,en