 That season, Hartman racked up a career-high 316 penalty minutes and added 8 goals.The 1989–90 season proved to be Hartman's best statistically, as he scored a career-high 11 goals and 10 assists and led the Sabres in penalty minutes for the second straight year with 211.At the beginning of the 1991–92 season, after three full seasons with the Sabres, Hartman was part of a five player swap with the Winnipeg Jets.