The Cubs are about to find out if the closer really matters for a team that lost 101 games last season and had to answer questions about a summer sell-off during spring training.

Kevin Gregg pumped his fist and shook hands with catcher Welington Castillo as “Go Cubs Go” started playing on the Wrigley Field sound system late Monday night after a 5-3 victory over the San Diego Padres.

Gregg doesn’t sound completely sold on the idea of closer-by-committee, but then again he’s not complaining after going to camp with the Los Angeles Dodgers and signing a minor-league deal here this month. A bad start forced the Cubs front office and manager Dale Sveum to improvise.

“There’s pros and cons to both ways,” Gregg said. “You name a closer and you definitely allow guys to slide into a position where they’re comfortable and know what they’re preparing for. Sometimes that also backfires on some guys.

“The anxiety gets to them a little bit...Late in the game in the seventh inning and late in the game in the ninth inning are two different animals. You’ve got to know what guys are comfortable with, what situations they’re going to be successful in.”

Gregg – who lost the closer’s job to Carlos Marmol near the end of an up-and-down 2009 season at Clark and Addison – looked relaxed in front of a crowd of 32,169 that included chairman Tom Ricketts standing in the first row.