DENVER — Banning or limiting defensive shifts would be an effort to restore Major League Baseball to how it was played before offense was suffocated by analytics, according to baseball Commissioner Rob Manfred.

Speaking before Tuesday’s All-Star Game to the Baseball Writers’ Association of America, Manfred said seven-inning doubleheaders and starting extra innings with runners on second base likely will be dropped after this season.

He said extending the designated hitter to the National League could be possible, but not definite.

“I think it would be a non-radical change, but I’m not going to speculate on whether we’re going to propose it or get it,” he said.

Manfred said MLB was considering having umpires explain video review decisions to fans at ballparks over the public-address system, similar to the procedure in the NFL.

MLB’s collective bargaining agreement with the players’ association expires Dec. 1.

“Let’s just say you regulated the shift by requiring two infielders each side of second base. What does that do? It makes the game look like what it looked like when I was 12 years old,” he said. “It’s not change. It’s kind of restoration, right? That’s why people are in favor of it. And they do believe, I think front offices in general believe it would have a positive effect on the play of the game.

“So I’m hopeful without going into the specifics of rule by rule, that we will have productive conversations with the MLBPA about — I want to use my words — non-radical changes to the game that will restore it to being played in a way that is closer to I think what many of us enjoy historically.

“Remember, the game evolves, right? What we play today don’t look all that much like 1971.”