The Denver Broncos signed veteran Ryan Harris after All-Pro left tackle Ryan Clady tore his ACL during last weeks OTA practices. Harris is a eight-year veteran who spent his first four NFL seasons (2007-10) with the Broncos after being selected by the team in the third round (70th overall) of the 2007 NFL Draft from the University of Notre Dame.
— Jeff Legwold (@Jeff_Legwold) May 28, 2015
I believe Harris wasn't signed to replace Ryan Clady at left tackle, but to replace Ty Sambrailo at the right tackle spot.