Bergen's professional baseball career started in 1892, when he served as the
catcher for the
Salem Witches of the
New England League. He played 59 games for them,
batting .247. Following their season, he returned to play some games for the Brookfields, a practice he would continue in subsequent years. He spent most of the 1893 season with a team in
Northampton, though he also played three games for the
Wilkes-Barre Coal Barons of the
Eastern League. On July 11, still in the midst of the season, he married Hattie Gaines, who had moved to North Brookfield a year before to work at a
flour mill. The couple had three children: Martin Jr., Florence, and Joseph. They kept their permanent residence in North Brookfield, purchasing real estate on Boynton Street, which they named Snowball Farm. In 1894, Mack became the manager of the
Pittsburgh Pirates of the
National League (NL). He tried to draft Bergen, but the contract was voided when the Pirates assigned the catcher to a
minor league team, a practice which
major league teams were not allowed to do at the time. The minor league team was
Lewiston of the New England League, for whom Bergen played even though he was no longer under contract with Pittsburgh. Playing 97 games, Bergen batted .321. Teams at higher levels were interested in Bergen again in 1895. This time, they were the
Washington Senators of the NL (major league) and the
Kansas City Blues of the
Western League (minor league), both of which drafted him. Baseball officials sent him to the Blues, where he had a strong performance in 1895. However, his moody behavior caused trouble. In the middle of the season, Bergen left the Blues suddenly over a perceived slight and did not return until over a week had passed. Nevertheless, he played 138 games for the club, batting .372 with 118
runs scored and 188
hits.
Kid Nichols, who was from Kansas City, recommended the player to
Frank Selee, manager of the
Boston Beaneaters. The team drafted him and looked forward to employing him for 1896, though team owner
Arthur Soden had to go to North Brookfield to assure Bergen he was wanted and valued by his new club. ==Boston Beaneaters (1896–1899)==