Like a flame-throwing closer summoned from the bullpen, Mayor Rahm Emanuel got the save Thursday in delivering the biggest win yet in the Cubs’ quest to renovate Wrigley Field without a public subsidy.

Over the emotional objections of local Ald. Tom Tunney (44th), the Emanuel-controlled Commission on Chicago Landmarks unanimously approved a 4,560-square-foot video scoreboard in left field; a static, 650 sqaure-foot see-through sign in right field, and a “sign matrix” that will guide future stadium advertising.

The Jumbotron will be 95 feet wide and 48 feet tall. That’s down from a width of 100 feet, meaning five feet less of rooftop blockage. But the script sign atop the Jumbotron and the light standards above that would take the entire video board to 5,700 square feet.

That’s way too big to satisfy Tunney and rooftop club owners, whose 17 percent revenue-sharing agreement with the Cubs has 10 more years to run.

Thursday’s meeting was delayed for two hours, in part, to allow the mayor’s political point man, Matt Hynes, to huddle privately with Tunney in hopes of softening his opposition. It didn’t work.

The alderman choked back tears as he declared his opposition to a video scoreboard with lights that, he warned, would be visible from “blocks and blocks away” from Wrigley.