Juan Pablo Montoya will drive the No. 12 Penske Racing Ford Fusion in the June 15 race at Michigan International Speedway, and again July 27 at Indianapolis Motor Speedway.
Montoya has 253 career starts in the Sprint Cup Series, with two wins, 24 top-fives and 59 top-10s. All of his races came for Chip Ganassi, with every start but one in the No. 42. He was a full-time driver in the Sprint Cup Series from 2007-13.
"It will be fun to get back behind the wheel of the Cup car," Montoya said in a team release.
"It's hard to believe, but Roger Penske has never won the Brickyard 400. I think that Brad (Keselowski), Joey (Logano) and I will give Roger and Team Penske a great opportunity to check that off the list and we should be strong at Michigan as well."
Ganassi announced late last season that Kyle Larson would pilot the No. 42 in 2014.
Montoya, a former open-wheel champion, drives for Roger Penske in the IndyCar Series.
"Juan is a proven winner in multiple racing disciplines and he is one of the most versatile racecar drivers competing today," Penske said in the release. "Michigan and Indianapolis are two important races for Team Penske. We know Juan has the ability to race for wins in both of those events."