The second album from The Baseball Project, Volume 2: High and Inside, was released on March 1, 2011, on Yep Roc Records. The band followed the record's release with a tour covering the U.S. and appearances at spring training games in Arizona's Cactus League.[1] Mike Mills begins touring regularly with the band in 2012, taking over bass duties from Peter Buck. Buck moves over to his signature 12-string guitar role around this time.
Their third album, 3rd, includes Mike Mills playing bass on all tracks for the first time on a Baseball Project recording, and was released in 2014. Not long after that the band played a special show in Cooperstown, New York, at the Baseball Hall of Fame. In 2019 they played a 3-day residency at the Rock and Roll Hall of Fame in Cleveland as a part of the All-Star Game festivities in the city.