Barnes signed a one-year deal last year to come to Oakland after four years in Jacksonville. He was expected to compete for a starting left tackle spot with Mario Henderson, but broke his left ankle in training camp. He appeared in just six games last season, appearing mostly on the right side of the line.
In other news, Oakland also hired Keven Ross as DB coach. He spent 5 years with Minnesota and San Diego.
Ross played defensive back for 14 seasons with Kansas City, Atlanta and San Diego. He was a two-time Pro Bowl selection and recorded 38 career interceptions.