On February 12, 2018, one day before the start of free agency, Lulay and the Lions agreed to a one-year contract extension. On July 13, 2018, the Lions announced that Lulay would be the team's starting quarterback in their Week 5 match against the Blue Bombers. Incumbent starting quarterback Jonathon Jennings, who struggled in 2017, continued his poor play into the early weeks of the 2018 season. Lulay started and finished the following six games for the Lions, winning twice. He suffered a concussion in Week 13 against the Redblacks. Then the following week was knocked out of the contest in the first quarter after suffering a separated shoulder. In the days following the Lions announced they expected Lulay to miss four to six weeks recovering. The Lions revealed that Lulay would return from injury in time for the team's Week 18 match against the Calgary Stampeders. In the off-season the Lions brought in All-Star Mike Reilly to be the starting quarterback. As a free agent Lulay received multiple offers from other teams looking to sign him to a contract, however on February 28, 2019, he ultimately decided it was time to retire from professional sports.