"They told me why they're going to do it and they talked to me about taking responsibility," Guillen said prior to Friday's games with the Orioles. "(Serving the suspension) is something I should be doing. I shouldn't be (tweeting) during the game."
Guillen was suspended for games on Friday and Saturday and fined an undisclosed amount for on-field actions in the first inning of Wednesday's game against the Yankees and for comments made via Twitter following his ejection.
It was the first time baseball has penalized a player, coach or manager for use of the social networking site during a game.
Guillen was tossed Wednesday night for arguing with plate umpire Todd Tichenor in the first inning of Chicago's game against the New York Yankees. The combustible manager then went on Twitter to say the ejection was pathetic.
"I don't blame Major League Baseball for being upset with me," Guillen said, who was ejected by home plate umpire Todd Tichenor. "I made a mistake."
It's not the first time Twitter has gotten a member of the Guillen family in trouble with the White Sox. Guillen's son, Oney, left the team's scouting department after some posts criticized the front office in spring training 2010. The episode led to season-long friction between Guillen and general manager Ken Williams that had been patched up.
Guillen has had numerous outbursts during his managerial career, which began in 2004. Among his targets have been Yankees star Alex Rodriguez, umpire Hunter Wendelstedt and former teammate Magglio Ordonez, who currently plays for the Detroit Tigers.
Guillen was ordered to sensitivity training in 2006 after calling former Chicago sports columnist Jay Mariotti a derogatory name.
He apologized to Rodriguez for comments he made in a Sports Illustrated article in which he criticized the Yankees' star third baseman for waffling on his choice of countries for the World Baseball Classic and suggested he was a hypocrite.
In his first season as manager, Guillen called Wendelstedt a liar. Later in the season, Guillen sarcastically referred to Buck Showalter, then with the Texas Rangers, as the best manager in the history of baseball and the guy who invented the game — all after Showalter questioned Guillen's knowledge of the rules.
Guillen also went off on a profanity-filled rant against Ordonez, a fellow Venezuelan who left the White Sox and joined the Tigers. Guillen went on yet another tirade after a radio host questioned his lineup on the air.
Williams said Guillen fully understands the ramifications of his actions — on the field and online.
"He has accepted all the responsibility that came with the action. We're mindful that we don't have our manager and we have to be respectful of the umpires. And maybe even respectful to them to a greater degree as a result of what they may be feeling."
Guillen said he won't stop using social media.
"I will continue to Twitter," he said. "I just won't tweet during the game. I've been tweeting for two years. That's the first time I ever, ever tweet about baseball. Look what happened. I learned a lesson."