Cubs outfielder Joe Mather switched his uniform number from 16 to 21.
``I had it in high school. I used to watch the tapes of Roberto Clemente running around and always saw that No. 21 and liked it. It became availlable and I asked [clubhouse manager Tom Hellmann] if I could have it.''
No. 21 was Sammy Sosa's number with the Cubs, Sosa also a Clemente fan.
Mather hit a home run Monday wearing the new number.
``It was a good way to break it in,'' he said.