The Atlantic Division got down to business ahead of NHL free agency’s opening bell.

The Tampa Bay Lightning signed prized winger Jake Guentzel to a seven-year, US$63-million deal Monday — roughly three hours before players on expiring contracts went to market at 12 p.m. ET.

The Toronto Maple Leafs, meanwhile, locked up Chris Tanev to a six-year, $27-million pact that will see the shutdown defenceman play in his hometown.