Thomas was scratched for the sixth straight game in Monday's 1-0 loss to the Oilers.
Thomas (undisclosed) was activated from IR ahead of Saturday's matchup with the Wild.
Thomas (undisclosed) was in a regular jersey at practice Thursday, Zach Dooley of the Kings' official site reports.
Thomas (undisclosed) was put on injured reserve Friday.
Thomas inked a two-year, $1.55 million contract with Los Angeles on Thursday.
Thomas was reassigned to AHL Ontario on Tuesday.
Thomas was promoted from AHL Ontario on Sunday, Russell Morgan of Hockey Royalty reports.
Thomas was placed on waivers by the Kings on Sunday, per Chris Johnston of TSN.
Thomas (shoulder) practiced Thursday, Austin Stanovich of LA Hockey Now reports.
Thomas (shoulder) signed a one-year, two-way contract with LA on Saturday.