Adams also pitched two games in 1992 Summer Olympics as a member of the United States national baseball team.

[3] During his first season as a member of the Stanford Cardinal baseball team, Adams won the "Most Valuable Freshman" award presented by the school's athletics department.

[4] Willie was selected by the Oakland Athletics in the first round (36th pick overall) of the 1993 Major League Baseball Draft.

He began his professional career that season with the Class-A Madison Muskies of the Midwest League.

With Madison, Willie went 0–2 with a 3.38 earned run average (ERA) and 22 strikeouts in five games, all stars.

[8] During that season, Willie played for the Double-A Huntsville Stars and the Triple-A Edmonton Trappers.

In 1996, Willie attended spring training with the Oakland Athletics, but was optioned to the minors on March 18, before the start of the regular season.

He split the season between the rookie-level Arizona League Athletics and the Triple-A Edmonton Trappers.

During his final professional season, 2000, Willie played for the Triple-A Pawtucket Red Sox.

Willie finished the season with a record of 0–2 with a 5.47 ERA, four saves and 21 strikeouts in 20 relief appearances.