The Cubs also called up right-handers Yoervis Medina and Ben Rowen.
Cubs starters are averaging fewer than six innings per outing.
The Cubs have to decide whether Neil Ramirez’s future is in the rotation or bullpen.
“There have been a lot of good individual performances out here,” GM Jed Hoyer said.
Rick Renteria has to weigh winning games with protecting the future.
Anthony Rizzo was responsible for two of Chicago’s 17 strikeouts Sunday. He also had the biggest hit of the game for the Cubs. Rizzo hit a game-ending RBI single in the 12th inning, and the Cubs beat the Tampa Bay Rays 3-2 to avoid a three-game sweep.
Justin Ruggiano homered for the second straight game for the Chicago Cubs, who used another solid outing from Jason Hammel to beat the Washington Nationals 7-2 on Friday.
The overall news was good for C.J. Edwards, who has no structural damage.
The Cubs’ bullpen has blown four of its six save chances.
Both pitchers will be available to this afternoon.
Jake Arrieta, Brett Jackson, Josh Vitters, Mike Olt and Junior Lake are among those who have agreed to terms.