Viso's addition, announced Thursday, is a joint effort between Andretti and HVM Racing.

NPR: Andretti Autosport Signs EJ Viso For 4th Car

I'd like to thank Keith and HVM for their assistance in this project.

NPR: Andretti Autosport Signs EJ Viso For 4th Car

The Keith Wiggins-owned HVM team was not planning on racing in IndyCar this season, but holds one of the coveted series-subsidizing Leader's Circle bonuses.

NPR: Andretti Autosport Signs EJ Viso For 4th Car

The partnership allows HVM Racing to continue its participation in IndyCar in a business role while anticipating a potential return to competition in 2014.

NPR: Andretti Autosport Signs EJ Viso For 4th Car