In a long-rumored move, the Twins finally trade Rick Aguilera, along with minor league P Scott Downs, to the Cubs for minor league pitchers Jason Ryan and Kyle Lohse. The next day, Cubs reliever Rod Beckundergoes arthroscopic surgery on his elbow.

This Day In Baseball

On May 21, 1999 — In a long-rumored move, the Twins finally trade Rick Aguilera, along with minor league P Scott Downs, to the Cubs for minor league pitchers Jason Ryan and Kyle Lohse. The next day, Cubs reliever Rod Beckundergoes arthroscopic surgery on his elbow.

Source:
Baseball Reference May 21