How Do Taxes Work for American Pro Athletes in Canada?

Earlier this week, national baseball writer Jeff Passan published news that the Tampa Bay Rays had received permission to explore becoming a dual city team, playing half of their home games in Florida and half in Montreal, returning baseball to Montreal after a  years-long absence. https://twitter.com/JeffPassan/status/1141761834434871297 This news prompted many jokes about the team being…