A few hours before Game 5 of the World Series, Cleveland pitching coach Mickey Callaway considered whether his team’s celebrated and creative use of the bullpen during the hothouse of October could be applied to the pastures of the regular season.

He leaned against a wall in a Wrigley Field dugout and agreed that maybe it’s not the team with the best one or two relievers. It could be the extra starter, or two.

“You could do what we’re doing in the regular season if you have two, three guys who are willing to do it, and you have to be really, really good,” Callaway said. “The names you bring up could be two of those guys who do something like that. If you have two or three really good arms like you’re talking about, yeah, maybe, it is possible during the season.”

Those names? Michael Wacha and Trevor Rosenthal.

On Wednesday, Cardinals manager Mike Matheny phoned Rosenthal to tell him that he will be “stretched out” for spring training and offered a chance to show what he can do alongside the starters. General manager John Mozeliak spoke with Rosenthal’s agent, Scott Boras, at the GM meetings in Arizona, and Boras described his client as “excited about this potential, and so is the club.” All-Star Rosenthal is one year removed from back-to-back 45-save seasons, but he has long harbored the hope of getting a chance to start.