In 14 games with the 2000 Phillies, Trever Miller managed to allow 9 walks and 19 hits over 14 innings. Trever was acquired at the end of Spring Training 2000 from the Houston Astros for Yorkis Perez, another favorite of mine. He was released in mid-May and picked up by the Los Angeles Dodgers, where he pitched just 2.1 innings, but somehow accumulated an impressive ERA of 23.14.
Obviously, Trever has had success in the Majors since then, as he's still employed. In fact, over the past several years, he's been one of the most consistent left-handed relievers in baseball, while pitching for the Tampa Bay (Devil) Rays, the Houston Astros (again) and now the St. Louis Cardinals.