NFL Media Insider Ian Rapoport reports the running back is in Texas to train on his own as the team begins workouts. CSN Bay Area first reported the news.
While the workouts are voluntary, James' absence is notable because he has been subject of trade rumors entering his third NFL season.
James would welcome a fresh start where he could get more playing time, the report from CSN Bay Area stated.
Since being drafted in the second round out of Oregon, the shifty back has been stuck behind Frank Gore, Kendall Hunter and other tougher runners on the 49ers' depth chart. He had just 12 rushing attempts in 2013 and spent most of his time returning kicks.
Not attending workouts is just one more indicator that the 24-year-old believes his NFL future lies outside of San Francisco.