Major League Baseball has officially approved the substitution of Joey Loperfido for Anthony Santander on the Blue Jays’ playoff roster. Manager John Schneider told reporters (including Ben Nicholson-Smith of Sportsnet) this evening that Santander was dealing with back stiffness. His season is over.
Teams set their postseason rosters at the beginning of each series. They can only make changes mid-series in the event of an injury. A player removed midway through a series is ineligible for the following series if his team advances, so Santander could not participate in the World Series if the Jays come back to beat the Mariners.