The forward, who was selected in the fifth round (No. 148) of the 2003 NHL Draft by the St. Louis Blues, had 469 points (203 goals, 266 assists) in 911 games. He also had six points (three goals, three assists) in 28 Stanley Cup Playoff games.
Stempniak played for 10 NHL teams -- the Blues, Toronto Maple Leafs, Phoenix Coyotes, Calgary Flames, Pittsburgh Penguins, New York Rangers, Winnipeg Jets, New Jersey Devils, Boston Bruins and Carolina Hurricanes. He played two games with the Bruins last season.
"I am honored and privileged to have played in the NHL for [14] seasons and I am extremely grateful to have lived my dream every day throughout my career," Stempniak said.
"After living in 10 cities, I am looking forward to spending time with my family, settling in Boston and being a father."