Goodell says he will meet with Roethlisberger before the regular season starts in September and determine whether to reduce the punishment to four games.
During a visit to the Baltimore Ravens' training camp Wednesday, Goodell said: "He is doing what he's been asked to do -- and frankly more."
Goodell added that Roethlisberger "understands the seriousness of this and the fact he has to change the way he's doing things. I'm encouraged by that."
Goodell is scheduled to visit Steelers camp Thursday and plans to meet with Roethlisberger.
"I feel like I've done everything asked and then some," Roethlisberger told the Pittsburgh Tribune-Review on Wednesday. "I want him to know -- and I think he does know some of the things -- I want him to know I have done everything he's asked and tried to go above and beyond."
Information from The Associated Press was used in this report.
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