"I Googled what was going on, and it said signs of a heart attack," Davis said at the time.
He went to the hospital and was diagnosed on May 15, 2010, with pericarditis, an inflammation of the lining surrounding the heart. He had started five days earlier for the Brewers. Davis did eventually make another start July 9, 2010, but was then out the rest of the year because of left elbow problems, which required flexor tendon surgery.
On Saturday, Davis, 35, will make his first start in the Major Leagues since last July when he takes the mound for the Cubs against the Giants. The lefty signed a Minor League deal with the Cubs on April 12 and made one start for Class A Daytona on May 5, and one for Triple-A Iowa on Tuesday.
"He's ready to roll," Cubs pitching coach Mark Riggins said.
Davis stopped by the Cubs clubhouse early Friday to meet Riggins, manager Mike Quade and some of the players and staff. He will be officially added to the roster on Saturday. The Cubs do know the lefty. He beat them in the 2007 National League Division Series when he was pitching for Arizona. In his career against the Cubs, Davis is 9-8 with a 3.55 ERA in 18 games.
"I'm glad he's pitching for us," Quade said. "Every time he's taken the mound against clubs I've been around, it's been very bad for the clubs I've been on. He owned us in Oakland, and he was tough on us here in the playoffs with Arizona.
"He's an experienced guy, changes speeds, he's not going to overpower anybody, he's going to have to locate. Rarely do you get a guy with that kind of experience, is familiar with the opposition, and I think he'll handle all the rest of it very well."
Davis did have some butterflies Friday morning. Quade was happy to see that.
"It's exciting for him to be back in the game, and I think he's ready to go," Quade said.