Welcome to Wikipedia. Everyone is welcome to make constructive contributions to Wikipedia, but at least one of your recent edits, such as the one you made to Mark McGwire, did not appear to be constructive and has been automatically reverted by ClueBot.

• Please use the sandbox for any test edits you would like to make, and take a look at the welcome page to learn more about contributing to this encyclopedia. Note that human editors do monitor recent changes to Wikipedia articles, and administrators have the ability to block users from editing if they repeatedly engage in vandalism.
• Cluebot produces very few false positives, but it does happen. If you believe the change you made should not have been detected as unconstructive, please report it here, remove this warning from your talk page, and then make the edit again.
• The following is the log entry regarding this warning: Mark McGwire was changed by Mark McGwire Expert (u) (t) making a minor change with obscenities on 2009-11-10T15:54:30+00:00 . Thank you. ClueBot (talk) 15:54, 10 November 2009 (UTC)[reply]