SAN ANTONIO -- The Spurs continue to work to fortify their 2017-18 roster, agreeing to terms Monday with free-agent center Joffrey Lauvergne on a two-year contract, sources confirmed.

The Vertical first reported the news.

Lauvergne, 25, became an unrestricted free agent on Saturday when the Chicago Bulls rescinded their qualifying offer, spurring interest from multiple teams.

San Antonio jumped into the fray, as it is looking to add to its frontcourt after veterans Pau Gasol, David Lee and Dewayne Dedmon all opted out of the final year of their contracts. Lee and Dedmon are drawing interest from multiple teams, according to league sources. Gasol is expected to return to the Spurs on a more team-friendly deal after declining his $16.2 million option to free up cap space for the team.

Lauvergne has averaged 6.1 points and 4.0 rebounds over three NBA seasons, and split time in 2016-17 between the Oklahoma City Thunder and Bulls, who added him to their roster in a deal at the trade deadline.