The Calgary Flames have invited free-agent defenseman Andrew MacDonald to training camp on a professional tryout agreement, the team announced Thursday.

MacDonald, 32, signed a six-year, $30-million contract with the Philadelphia Flyers ahead of the 2014-15 season, but the Flyers bought him out in June with one year remaining on the deal.

Flames general manager Brad Treliving recently expressed interest in acquiring another defenseman after 20-year-old rearguard Juuso Valimaki tore his ACL during an August training session.

MacDonald recorded nine assists and averaged 16:24 of ice time over 47 contests with the Flyers last season. The veteran blue-liner has tallied 28 goals and 161 points in 586 career contests.

The Flames have $7.76 million in projected cap space with restricted free-agent forwards Matthew Tkachuk and Andrew Mangiapane in need of new contracts, according to CapFriendly.

Calgary bought out the final season of defenseman Michael Stone's contract earlier in August.

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