With jobs in their bottom-six forward group up for grabs when training camp opens on Sept. 20, the Bruins added yet another body to the mix on Monday.

The B’s signed well-traveled forward Alex Chiasson to a Professional Tryout Agreement. The 32-year former Boston University Terrier and Montreal native last played in the Detroit organization, playing 20 games for the big club late in the season, contributing six goals with three assists. He also played 29 games in Grand Rapids in the AHL.

Originally a second-round pick of the Dallas Stars (38th overall) in the 2009 draft, the 6-foot-4, 208-pound Chiasson has also played for the Ottawa Senators, Calgary Flames, Washington Capitals (with whom he won a Stanley Cup in 2018), Edmonton Oilers and the Vancouver Canucks. His most productive season was in 2018-19 with the Oilers when he had 22-16-38 totals in 73 games.

The PTO deal guarantees Chiasson nothing, but he’s had a knack of turning tryouts into NHL contracts. His stops in Washington, Edmonton and Vancouver all began with PTOs. Last year, he also had a PTO with the Arizona Coyotes but could not get a deal done there. He signed an AHL deal with Grand Rapids and then was eventually inked to a regular two-way contract with Detroit late in the season.

While the B’s could ice a decent top six with David Pastrnak, Pavel Zacha, Brad Marchand Jake DeBrusk, Charlie Coyle and James van Riemsdyk, the bottom six does not have as many established players. They’ve signed Morgan Geekie, Milan Lucic, Patrick Brown, Jesper Boqvist, re-upped Trent Frederic and still have AJ Greer. They also signed college free agent John Farinacci and their own prospects like Georgii Merkulov and Fabian Lysell should get decent looks in camp. And now they’ve added Chiasson.

But just how – and how well – all the pieces to the puzzle fit together will be worked out in training camp and, most likely, throughout the early stages of the season.