DENVER (AP) The Chicago Cubs have put pitcher John Lackey on the 15-day disabled list because of strained right shoulder.

The Cubs made a series of moves Friday before their scheduled game in Colorado.

The 37-year-old Lackey has made 24 starts this year in his first season with the NL Central leaders. He is 9-7 with a 3.41 ERA.

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Lackey's move to the DL was retroactive to Monday.

The Cubs also put right-handed reliever Hector Rondon on the 15-day disabled list with a strained right triceps. He is a 2-3 with a team-leading 18 saves and a 2.47 ERA. That move was retroactive to Wednesday.

Right-hander Felix Pena and left-hander Rob Zastryzny had their contracts selected from Triple-A Iowa.

To make room on the 40-man roster for the two additions, right-handers Dallas Beeler and Aaron Brooks were transferred to the 60-day disabled list.