In August 2003, Walsh officially joined Pedro the Lion, led by David Bazan.
Citing personal and financial reasons, Walsh left both projects in late 2005, after which Bazan retired the Pedro the Lion moniker.
[1] The nine songs from the two EPs were later reissued on a single album, The Soft Drugs, released in 2013.
Walsh also provided musical, mastering and production assistance for other artists, including Sufjan Stevens—for whom he mastered All Delighted People, Planetarium, Carrie and Lowell Live and The Age of Adz[2][3]—Starflyer 59, Ben Gibbard, Nathaniel Rateliff, Damien Jurado, Cold War Kids, Clap Your Hands Say Yeah, The Shins, Kristin Hersh, and nearly 1,000 others.
Walsh formed a new band called Lo Tom with longtime friends David Bazan, Jason Martin (of Starflyer 59), and Trey Many.