CHICAGO — When Marcus Stroman strolled out to the Chicago Cubs bullpen 40 minutes before Sunday’s game against the Milwaukee Brewers, he raised his arms over his head and exhorted fans to start cheering early. It was a perfect opening for the anticipated debut of the “Stro Show,” the nickname given to the veteran starter whom the Cubs signed to a three-year, $71 million deal on the eve of the lockout. Not since towel-waving reliever Dick Selma in 1969 has a Cubs pitcher taken it upon himself to get the fans revved up into a party atmospshere. “I’ve been like this, my man, since forever,” Strom…
