A left-handed pitcher, Wilkinson played for Major League Baseball's (MLB) Seattle Mariners in 1985, and from 1987 to 1988.

[2] On June 13, 1985, he made his MLB debut with the Mariners, and took the loss against the Kansas City Royals after allowing four earned runs in five and two-thirds innings.

[3] Five days later, Wilkinson lost in his only other appearance during the 1985 season, which was also a start; he allowed five earned runs and recorded only one out.

[6] Wilkinson did not pitch in MLB in 1986; he instead played for the Mariners' Triple-A affiliate, the Calgary Cannons of the Pacific Coast League.

[1] His final minor league season was 1992, when he pitched for two teams in the Oakland Athletics organization, posting an 0–3 record and 8.21 ERA in 23 games.