Cubs place Lackey and Rondon on disabled list

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CHICAGO, IL - AUGUST 14: John Lackey #41 of the Chicago Cubs reacts as he sits in the dugout after being taken out of the game against the St. Louis Cardinals during the seventh inning at Wrigley Field on August 14, 2016 in Chicago, Illinois. (Photo by Jon Durr/Getty Images)

CHICAGO, IL – AUGUST 14: John Lackey #41 of the Chicago Cubs reacts as he sits in the dugout after being taken out of the game against the St. Louis Cardinals during the seventh inning at Wrigley Field on August 14, 2016 in Chicago, Illinois. (Photo by Jon Durr/Getty Images)

DENVER, Colo. – He may have wanted to tough it out, but John Lackey is headed to the disabled list.

Lackey, who exited Sunday’s game against the Cardinals with shoulder tightness, will have company on the D.L. with setup man Hector Rondon slated for some scheduled time off.

Rondon has been battling triceps soreness for the last few weeks.

Despite reaching 96 mph in his return to the lineup, the Cubs’ former closer did not fare well Sunday, giving up four earned runs on four hits in less than an inning of work.

Sources close to the team say neither Rondon or Lackey have suffered setbacks, calling the moves “precautionary.”

The Cubs called up left-handed starter Rob Zastryzny and right-handed reliever Felix Pena to help fill the void.