Another of the many uniform numbers that would be held by more than one player. It is not surprisingly that a not very good expansion team went through many players. Federico Velazquez would get into 6 games with the Pilots wearing #30. He would be bought by the Oakland A's on May 27th.
courtesy of baseball-almanac
Another player would be bought came to the Pilots. Seattle purchased Ron Clark from the Minnesota Twins on July 11th. Ron would move to other teams, but would eventually make his way to the new version of the Pilots in the vain of the Milwaukee Brewers.