Jeffcoat was first selected in the 1977 MLB draft by the St. Louis Cardinals, but did not sign.

[1] Jeffcoat's professional playing career began in 1980 and ended in 1994, doing which he pitched in 283 games in Minor League Baseball, compiling an 85–59 win–loss record.

[2] At the Triple-A level, he had a 58–36 record with 3.91 earned run average (ERA) in 215 games (97 starts).

[3] He pitched to an overall MLB record of 25–26 with a 4.37 ERA, three complete games, and seven saves.

[4] On December 17, 2020, Jeffcoat was hired to be the manager of the Cleburne Railroaders of the American Association of Independent Professional Baseball.