After the end of Bieser's college career, the Philadelphia Phillies chose him in the 32nd round of the 1989 June draft, with the 818th overall pick. Very few players chosen that low in the draft advance to the major leagues, but Bieser defied the odds. He advanced to AAA within the Phillies' organization, and after signing with the New York Mets as a six-year minor league free agent, made his major league debut on April 1, 1997. Bieser appeared in 47 games with the Mets that year, chiefly as a bench player. His left-handed bat, above-average foot speed, and ability to play multiple positions helped him stay on the roster for a large portion of the season, as these traits afforded manager Bobby Valentine an unusual variety of tactical options. As a further testament to his versatility as a player, Bieser also filled in as a pitcher in minor league games during at least six different seasons . At the end of the year, he signed with the Pittsburgh Pirates as a free agent, and in 1998 he appeared in 13 games with that franchise. He finished his major league career with a.250 batting average, a.351 on-base percentage, and a.300 slugging percentage in 80 at bats. Continuing to play professionally after the end of his time in the majors, Bieser last appeared in uniform as a player with the Memphis Redbirds in 2001.
Coaching career
After his last game as a player, Bieser has become a high school baseball coach at St. John Vianney High School, a private Catholic school in Kirkwood, Missouri. His squad won the state championship in 2004. His team has again claimed the state championship in 2006. As of 2009 Steve Bieser was 117–42 in 6 seasons with the Vianney Griffins. Bieser also worked at the school as a math teacher. He left the position in 2010 for an assistant coaching position at Southeast Missouri State, where he was named the head coach prior to the 2013 season. In 2009, Bieser was the manager of the Danville Dans, a team in the collegiate Prospect League. Bieser coached the Southeast Missouri State Redhawks from 2013–16, leading them to 3 consecutive first-place finishes in the Ohio Valley Conference. On June 30, 2016, the University of Missouri announced Bieser as its 14th Head Coach.
Head coaching record
Below is a table of Bieser's yearly records as an NCAA head baseball coach.