Green said that Porter phoned him after arriving in Pittsburgh following the Steelers' 24-10 win Sunday.
"We did something we always do in pre game," Green said. "We kind of got into it. We were saying different words. The next thing I knew, I felt some spit in my face, and it went from there.
"We talked after the game, and we both realized it kind of got out of control. That's not something we do as players, and we apologized for that."
Green also apologized to his teammates for his actions. He said he planned to talk to owner Randy Lerner and express regret for what happened.
"The last thing I ever wanted to do was be ejected from the game," said Green, who watched the action from a private loge. "I'm sorry about that as far as my teammates go. Things happen sometimes, and it all went wrong. I wish I could take it back."
NO CONTROVERSY: Coach Butch Davis said that there's no quarterback controversy. The issue of the starting quarterback surfaced because of Davis' decision to bench Jeff Garcia in favor of Kelly Holcomb midway through the fourth quarter against the Steelers.
"There may have been some unclear situations after the game about Jeff Garcia's status," Davis said. "Make no mistake about it, Jeff is the starting quarterback."
"Make no mistake about it that I and no one in the organization condones any insinuation that in playing the game we're trying to intentionally hurt somebody," Davis said. "We don't condone it, and we don't tolerate it."
GARCIA'S COMMENTS DISMISSED: Davis said that Garcia's critical comments about the offense after Sunday's game came out of frustration.
"Jeff is like everyone else in this building that the day after a game, everybody is searching for an answer," Davis said. "You practice hard and have high expectations, and when you come up short, everyone is looking for ways to fix it."
NO SMALL FEAT: Davis admitted that building a NFL team is more difficult than he envisioned when he took the job in 2001.
"Very much so," he said. "I don't think anyone envisioned there would be a lot of the hurdles we had to overcome in the last 18 months. I don't think after two moderately successful years at the beginning that you'd have to start all over from scratch."
Davis was referring to the salary-cap purge of the 2003 offseason that set the stage for a 5-11 record last year.
COACH'S CORNER? As for his future as coach, Davis believes he has the support of Lerner.
"Randy and I talk after every game," he said. "I do believe that Randy clearly understands the challenges we've had as an organization over the last two years. It hasn't been easy. There have been an awful lot of very difficult things to overcome. I think he knows where we are from a talent and coaching point. I think that he's very supportive."