CHICAGO — Major League Baseball is having conversations with the players’ association over possible rule changes designed to speed the pace of play, and Commissioner Rob Manfred said Thursday he hopes to reach an agreement instead of implementing any measures unilaterally.

Speaking at the conclusion of the owners’ meetings, Manfred also said the Bruce Sherman-led ownership group trying to purchase the Miami Marlins has presented the league with a financial structure that would work for finalizing the deal. He expressed confidence that a major league franchise can be successful in the market.

The average time of a nine-inning game is a record 3 hours, 5 minutes this season, up from 3 hours last year and 2:56 in 2015. Management proposed making changes for this year, such as installing pitch clocks and limiting trips to the mound by catchers, but players’ association head Tony Clark said his side would not agree. The league can implement changes by itself with one-year advance notice.

“We met with Tony Clark and a group of players last week,” Manfred said. “The tone of those conversations have been very positive. Hats off to Tony and the players on that, and I remain confident that we will have changes for next year on the issue of pace of game that will be significant.”

Union spokesman Greg Bouris confirmed the dialogue is ongoing and said players “are committed to discussing ways to enhance the game and move it forward.”

DIAMONDBACKS: Reliever Rubby De La Rosa will undergo a second Tommy John surgery. De La Rosa first underwent the surgery in 2011 while with the Dodgers and missed most of the 2012 and 2013 seasons.

YANKEES: New York put first baseman Garrett Cooper on the 10-day disabled list with tendinitis in his left hamstring and promoted Tyler Austin from Triple-A Scranton/Wilkes-Barre.

METS: Jose Reyes was placed on the 10-day DL with a sore left ribcage.