Chris Johnson is on a mission. The Tennessee running back insists he's still the best in the NFL, and he's working hard this offseason to make sure he bounces back after the worst season of his career. Johnson has packed on 8 to 9 pounds of muscle as part of his strong commitment to the Titans' offseason program. It's a dramatic difference from last year, when Johnson missed nearly the entire preseason holding out for a contract extension. He got his money, then the self-proclaimed best running back in the league ran for 1,047 yards. That was less than 13 others in 2011. "I just know when I have been through the same things as everyone as far as camp and being on the same page as my offensive line, I feel like I am the best back in the league," Johnson said Wednesday. Johnson took a handoff Wednesday during the Titans' second week of organized team activities, made a sharp cut to the left and shot into a gap opened by seven-time Pro Bowl offensive guard Steve Hutchinson. The veteran is one of the Titans' top free agent acquisitions this offseason. Read more: http://espn.go.com/nfl/story/_/id/8020019/chris-johnson-tennessee-titans-bulks-vows-top-rb
