Commissioner Bud Selig is encouraged that the Cubs are in the home stretch in reaching their goals to update Wrigley Field. “I’m very optimistic,’’ Selig said on Tuesday, speaking at a meeting of the Baseball Writers Association of America. “I know they’re optimistic, and I am (too). You know Chicago politics don’t always move smoothly, to be honest, (but) I’m very optimistic. It’s not something that’s really concern. It’s far enough down the line (in the process), it’s going to work.’’ Selig declined to answer a question about whether the pace of talks had hamstrung the team’s finances. Selig indicated Major League Baseball is committed to continuing to rotate the All-Star Game between American and National League cities, which won’t help the Cubs’ ongoing efforts to land the event as soon as possible. Next year’s game will be held in Minnesota, with the 2015 game scheduled for Cincinnati. The Nationals, Phillies and Marlins haven’t hosted the game in their new stadiums. It appears Washington and Philadelphia are ahead of the Cubs, which would mean the 2021 options as the Cubs and the Marlins.