Patton was taken from the Colorado Rockies' Triple-A roster by the Reds and subsequently sent to the Cubs in exchange for cash. Patton was 4-5 with a 3.54 ERA in 50 relief appearances.
"He's got a great arm, he's got three-plus pitches," Cubs player development director Oneri Fleita said. "He's pitched out of the bullpen and gives us another guy who gives us some depth. He's got a plus arm, threw up to 94 miles an hour and throws strikes.
"He follows the path of the guys we've been getting, like [Kevin] Hart, and guys we've been able to acquire in the past."
Fleita said his scouts liked Patton and credited Jake Ciarrachi, an assistant with the player development department, with doing the majority of the homework on the young pitcher.
The Cubs did lose left-handed pitcher Donnie Veal in the first round of the Draft to Pittsburgh. Veal was 5-10 in 29 starts at Double-A Tennessee.
"This is one of those moments when there's mixed emotions," Fleita said. "I'm very happy for [Veal] and his opportunity with Pittsburgh, and he'll be sadly missed. We've been through a lot. I wish him the best, but if anything, I hope he takes it light on the Cubs when we match up for him. He's one of the guys you root for."
The Cubs did not make a selection at all but lost two players in the Double-A portion of the Rule 5 Draft. Oakland selected outfielder Yusuf Carter and Milwaukee chose right-handed pitcher Mark Holliman. Carter batted .233 at Class A Daytona, while Holliman was 3-4 with a 4.50 ERA at Double-A Tennessee and 1-1 with a 5.16 ERA at Triple-A Iowa.
"They're very talented guys, and this gives them an opportunity somewhere else," Fleita said. "They're great kids and have done a lot for this organization."
Carrie Muskat is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.