Frank Thomas has made his case for Hall of Fame enshrinement next year, while blasting some players that flourished in the so-called steroid era.

Thomas will be on the Hall of Fame ballot for the first time later this year.

"Watching all the nonsense unfold and not really knowing what was going on, it makes me much more proud of my career because I competed in that era and I played at a high level in that era," Thomas said.

"There were a lot of great players, but as it unfolds, a lot of it was not the real deal. I know 100 percent mine was the real deal."