CHICAGO (CBS) — Brian Urlacher spent part of the offseason seeking an injection-based cure for his left knee injury in Europe, sources tell The Score’s Mike Mulligan.

Mulligan reports in the Chicago Tribune that this explains the months of delay between Urlacher’s knee injury and the arthroscopic surgery he underwent to reduce pain and swelling just last week.

Two league sources tell Mulligan that Urlacher spent part of the offseason in search of a cure in Europe. One source said he left in May or early June to meet with a physician the source called “the famous doctor that everybody goes to,” while the other source said Urlacher opted for a “non-invasive treatment” that he paid for out of his own pocket, Mulligan reports.

Mulligan reports a Bears spokesman would not confirm, deny, or steer “in one direction or the other” about the question of whether Urlacher went to see German-based Dr. Peter Wehling.

Wehling is considered the primary founder of Regenokine therapy – an injection-based procedure that has not been approved by the U.S. Food and Drug Administration. But Kobe Bryant, Alex Rodriguez of the New York Yankees, super-agent and mayoral brother Ari Emanuel, and even the late Pope John Paul II are among those who underwent Regenokine therapy, Mulligan reports.

Watch & Listen LIVE