Spaling signed a one-year deal with Geneve-Servette HC of the Swiss League on Wednesday, Stephen Whyno of AP Sports reports.
Spaling will make his Sharks debut Wednesday, skating on the fourth line, reports Kevin Kurz of CSN Bay Area.
Spaling was traded to the Sharks on Monday in addition to Roman Polak for Raffi Torres and second round draft picks in 2017 and 2018.
Spaling (upper body) will return to the lineup Tuesday against the Panthers, Paul Hendricks of Leafs TV reports.
Spaling practiced Monday for the first time since suffering an upper-body injury in mid-December, Jonas Siegel of TSN 1050 reports.
Spaling (upper-body) is expected to miss an extended period of time due to the injury he suffered in Thursday's game against the Sharks.
Spaling has been ruled out of the remainder of Thursday's game against the Sharks with an upper-body injury.
Spaling picked up his first point since his return from injury in Wednesday's loss to Winnipeg. He set up Toronto's only goal in a 6-1 loss.
Spaling (upper body) will rejoin the lineup Monday against the Bruins, Paul Hendrick of Leafs TV reports.
Spaling (upper body) won't play Saturday against the Bruins, Jonas Siegel of TSN Radio 1050 reports.