The Red Sox weren’t privy to certain medical information when they made the Drew Pomeranz-for-Anderson Espinoza deal with the San Diego Padres on July 14. Following almost a two-month investigation by Major League Baseball, commissioner Rob Manfred handed down a 30-day suspension to Padres general manager A.J. Preller on Thursday.

“MLB considers the matter closed and will have no further comment,’’ the commissioner’s office wrote in a statement.

Red Sox president of baseball operations Dave Dombrowski said he could not comment on the punishment, but major league sources indicated that the team wasn’t looking to reverse the deal or have the deal nullified. They just didn’t have the data available on the medical procedures in place on how to use Pomeranz and what his medical needs were at the time.

Major League Baseball has a central database where teams can look up the latest medical information on every player in baseball. When it comes time for a deal, the teams can look up a player’s the medical information to know what they’re dealing with.

A major league source indicated the data on Pomeranz was pretty scant. It hadn’t been updated and the minimum information was offered. The Red Sox did their homework and conducted their own physical on Pomeranz before the deal was executed. But other teams complained the Pomeranz file was incomplete and/or information was withheld.

Dombrowski had made an offseason deal with the Padres in which he obtained Craig Kimbrel for a few prospects, including center-field phenom Manuel Margot. That deal was not questioned in the probe as the Red Sox seemed to have enough information on Kimbrel’s past medical maladies.

Preller has tried to reboot the Padres with his Boston deals and he has definitely added some mettle to the farm system as a result. Preller, however, has built up and sold off in one year’s time. The Padres spent a lot of money to sign James Shields and Matt Kemp and then traded them off for prospects.

It’s not known whether this latest problem could cost Preller his job. He was hired by former Red Sox chief operating officer Mike Dee, who is now the president of the Padres.

According to an ESPN report, Padres officials instructed their organization’s athletic trainers to maintain two distinct files of medical information on their players — one for industry consumption and the other for the team’s internal use. Trainers were told in meetings during spring training that the distinction was meant to better position the team for trades. ESPN cited two sources in the report.

Preller was also reprimanded earlier in the year for conducting illegal workouts, but was not suspended.

News of a probe into the Padres was first learned earlier this summer, and Red Sox owner John Henry confirmed the investigation to the Boston Herald. The Red Sox were also punished by MLB earlier this summer for their part in an international scheme to proportion allotted signing bonus money. MLB also closed the door on that quickly and didn’t allow anyone to speak on the matter.

Was the 30-day suspension enough?

One baseball executive felt there should have been a more specific punishment wherein the Red Sox would receive a player, but nothing like that was discussed. Preller was highly praised for extracting Espinoza from the Red Sox, while some thought he should have received more than a Single A prospect for a 27-year-old established lefthanded pitcher who is still controllable.

Nick Cafardo can be reached at cafardo@globe.com. Follow him on Twitter @nickcafardo.