Grossman announced his retirement due to lingering back problems.
Grossman was placed on waivers Saturday for the purpose of terminating his contract, Elliotte Friedman of HNIC reports.
Grossmann was assigned to AHL Stockton on Wednesday.
Grossman was waived by the team Tuesday, Craig Morgan of AZ Sports reports.
Grossman has only suited up for two of the Flames' 11 games so far this season, failing to register a point.
Grossman signed a one-year, one-way contract with the Flames on Tuesday, TSN's Bob McKenzie reports. The deal is valued at $575,000.
Grossman inked a professional tryout agreement (PTO) with the Flames on Wednesday, Pat Steinberg of Sportsnet reports.
Grossman (personal) will be in the lineup for the season finale Saturday night against host San Jose.
Grossman has left the team to be with his expecting wife, Sarah McLellan of the Arizona Republic reports.
Contrary to a prior report, Grossmann (illness) will play Tuesday against the Jets.