The 30-year-old Clarkson was acquired Feb. 26 from Toronto for injured right wing Nathan Horton. He was scoreless in three games.
Clarkson has been a major disappointment in two seasons with Toronto since signing a free-agent deal with a salary cap hit of $5.25 million through 2018-19. The 30-year-old Clarkson has 10 goals and five assists in 58 games this season. He has 112 goals and 84 assists in 544 NHL games with the Maple Leafs and New Jersey.