Tony Mosqueda's goal on that seventh shot ended up as the 2-1 winner, propelling Leland to Wedesday's semifinals in Big Rapids.
The victory puts Leland (25-3) in the Final Four for the first time in decades.
"Someone said 1982," Comets coach Joe Burda said. "It's been a long, long time.
"It's big. These seniors don't want to quit. They're just going with it."
The Comets will face Grand Rapids Covenant Christian (perplexingly) tomorrow night at 6 PM in Big Rapids, which is Halloween.