Fellow reliever Brandon Kintzler told him.
"It means a lot. When you're right there with a Hall of Famer, I take a lot of pride in that," Rodriguez said. "But at the same time, I'm not pitching for records at all. I pitch because I like this game, not for records or anything.
"But it's a privilege for me to be on that list. Definitely, it is."
Rodriguez did not expect to join that list on Saturday, not after a Rickie Weeks error led to a five-run Pirates rally and a Brewers deficit against Jason Grilli in the top of the ninth inning. When Ryan Braun stepped to the plate with a man on, Rodriguez stood up and prepared to get loose. If Braun reached base, Rodriguez would begin to warm up.
Instead, Braun lined a go-ahead home run right into the Brewers' bullpen.
"I hadn't even stretched," Rodriguez said. "I turn around and the ball is coming flying into us, so I had to start getting ready quick. The only thing that saved me was -- it might sound bad -- but [Aramis Ramirez] getting hit by a pitch, so I got a little more time to get what I need."
Rodriguez went through the same routine twice on Sunday, first when Braun tied the game at 2 with another ninth-inning home run off Grilli, and again after Khris Davis homered in the 14th for the Brewers' first lead. Rodriguez surrendered a two-out single to Pedro Alvarez, but struck out Starling Marte to end the game.
The next man for Rodriguez to catch on the all-time list is former San Francisco Giant Robb Nen, who saved 314 games from 1993-2002.
"[Rodriguez] is not that old, either," Brewers manager Ron Roenicke said, "so hopefully he'll get a lot more. He's throwing the ball really well."
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.