The Vancouver Whitecaps unveiled marquee signing Thomas Muller on Thursday and the World Cup winner could make his debut for the club on Sunday against Houston Dynamo.

After attending university in the U.S. and being drafted by CF Montreal, he returned to TFC earlier this year. He joined TFC 2 in March and was rewarded with a first-team contract last Saturday.

The CFL and NFL have revived their officiating development program, with two crews of seven CFL officials taking part in NFL training camp practices, beginning Wednesday.

Mark Delgado scored early in the second half and Mathieu Choinière found the net in stoppage time to lead Los Angeles FC to a 2-0 victory over the New England Revolution on Saturday night.

Deandre Kerr headed home a cross by newly signed Malik Henry in the 91st minute to lift Toronto FC into a 1-1 draw with the high-flying Philadelphia Union in MLS play Saturday.