TORONTO (AP) — Vancouver Canucks goalie Jacob Markstrom is using a tennis ball machine as part of his training to stay sharp. Columbus Blue Jackets counterpart Joonas Korpisalo doesn’t have that technology at his disposal during the coronavirus  pandemic, so a wall has had to do the trick. Toronto’s Frederik Andersen is self-isolating with No matter the setup, NHL puck-stoppers are having a hard time mimicking situations that even loosely resemble practice or game situations.