Jack Robert Howell (born August 18, 1961) is an American former professional baseball third baseman.

He made his Major League Baseball (MLB) debut on May 20, 1985, with the California Angels, and played his final game on July 17, 1999, with the Houston Astros.

He started with the California Angels where he from 1987 to 1989 averaged hitting 20 home runs per season until being traded to the San Diego Padres.

Howell next played Nippon Professional Baseball (NPB), and was a member of the Yakult Swallows (1992–1994), as well as the Yomiuri Giants (1995).

He then signed on as a free agent with the Houston Astros, with whom he ended his career in 1999 Howell was the hitting coach for the Arizona Diamondbacks.